
You reasoning about loss sales makes three assumptions. (1) that everyone who reads a scanned manga online would have bought that manga if it were not available on line, (2) that people who read for free do not buy material once they become fans and (3) that any "lost sales" are not offset by the value of promoting the manga and making it popular so that more people will be willing to by it.
I agree that people deserve to be paid. I think the belief that scans mean lost sales is based on fear and not facts. The publishers' marketing decisions are up to them, but I do not believe that scans mean lost sales.

1) of course not
2) of course yes
3) you have no facts there, either

Well, I don't know of any studies specific to manga, but there are studies showing that people who download music illegally are also the people who buy the most music.
http://www.metalinjection.net/latest-news/study-shows-illegal-downloaders-purchase-the-most-music-legally
http://www.huffingtonpost.com/2013/01/22/music-pirates-study_n_2526417.html
This is also true of movies.
https://www.techdirt.com/articles/20110721/04092915191/industry-suppressed-report-showing-users-shuttered-pirate-site-probably-helped-movie-industry.shtml
And even if they do not buy themselves (or at least not everything they read) they provide publicity and make the work more popular.
I understand the copyright industry and its promoters have paid for studies that show the opposite, but such sources have been caught purposefully misrepresenting their results, so to me they lack credibility.
http://www.cato.org/blog/how-copyright-industries-con-congress
Of course, this does not change the law. I am just saying there is evidence that the people who read for free may (1) buy what they like and (2) promote what they like.

Marketing strategy is based on PSM (potential sales made) vs. PSL (potential sales lost). PSM and PSL are calculated on assumptions. So, yes, I am making assumptions. I am making the same assumptions publishing company marketing and sales departments make about PSL every time they put out a manga. In marketing and sales, a lost sale is equivalent to an outlay of cash. Each lost sale is money paid by the publisher to the artist, the raw materials, supplier, the printer, the publishing staff, etc. with no return. Every reader of every free scan has consumed the publishers product without purchase - this is a lost sale. Just because the product is intangible, does not make this fact any less true. Because of this, the ASL (actual sales lost) far outweighs the any PSM.
My comment was meant to highlight that what is considered "free advertising" is not free to the publisher.

The problem is in how you define "lost sales" and whether you give full and accurate credit for potential sales made due to the online promotion. It seems likely to me that the fans who read online for free are likely to buy the manga they like the most, and likely to spread the word about Yoai to others, at the very least promoting the genre and the manga. It may not be entirely "free" to the publisher (but neither is most marketing). I have no legal right to force a particular marketing strategy on anyone. I am just saying there is no credible evidence that online sharing actually results in lost sales that are greater than the increase potential sales due to the exposure.

You look at the registered users and count each one as "lost sales"--this is not necessarily true. You could look at the users and see "potential sales" but you would have to allow that some people will buy what they read for free if they like it. You would also have to allow for some people to read and not buy. I would be as if people could go to Barns and Nobel, sit in a chair and read for free, and only buy what they want to take home. You could go to the bookstore, call everyone reading there thieves and kick them out, requiring people to pat for the books before they look at them--but I think sales would actually go down.

Look, I'm not going to debate fact against hopes and dreams. Take some courses on marketing and sales, read about copyright law and then get back to me. Because you're not getting this.
I read here too, A LOT. What I don't do, is hide behind false righteous indignation that what I am doing does not negatively effect the manga industry. I also don't try to justify my wrong actions by claiming that those actions HELP the manga industry. You shouldn't either.

Well you wont read 1350 mangas if it was for even 1 dollar, tbh I wouldn't even be interested in manga if it wasn't for these sites. Then again I'd buy some awesome mangas even if I read them for free like Totally captivated and 19 Days for example if I can afford them.

1 thing though. Without free Manga to read online, I won't even know it ever exist! But thanks to free Manga online, I discover all of this author's work. In my country most Mangas are forbidden. Even some shoujo manga, if shows 2 much of skin it's forbidden right away.
Just saying that the mayority won't even buy the authors work if didn't even know about them. But thanks to online Manga sites lots of people became fans and will buy it.
So I don't think by doing scanlating will drop sales. I'm sure lots of people who wanted to buy the Manga in the 1st place has start reading it for free. Like "Oh I want to buy that Manga,"
Here a question: "Why didn't they licence it since the beginning?" 'coz at 1st they didn't knew it will get popular. "How do they know it became popular?" 'coz I think they use Manga sites 2 see how popular a Manga is. Like "Oh this Manga got lots of ENGLISH readers, lets buy the rights of that Manga"

I have done both (marketing classes and classes on intellectual property), as well as a lot of research into Creative Commons licenses and free culture works. I simply disagree with the assumption that copyright infringement equals lost sales. Just because you think you have the facts, doesn't mean you have the facts.

If you have done as you say, you know that my argument is sound. The fact that YOU don't think copyright infringement means lost sales is irrelevant, the law and the publishers DO see copyright infringement as lost revenue. If a person is sued civilly or prosecuted criminally, damages awarded to the plaintiff (state or publisher) will be calculated based on the PSL and ASL as determined by the publisher and courts. Like it or not, it is what it is. I didn't write the law and I don't make decisions for publishers. Don't shoot the fucking messenger.

I am not blaming you. I have nothing against you. However, I disagree with what you cite as facts. The definitions of PSL and ASL used to create the data and the data analysis were both seriously flawed and therefore misleading at best. Th fact that the courts and politicians let it pass is no big surprise. Neither group is full of academic or economic experts.
People make money all the time with Creative Commons licenses and other open-culture models. Best-selling author Cassandra Clare posts her work for free on Wattpad, and her Mortal Instruments books still sell. Neil Gaiman put The Graveyard Book online for free, and it still sold (and won a few awards). The popular Cards Against Humanity game operates under a CC license, and shows that the "pay if you feel like it" model can work. Korean artist Miyoung Yi released her art with a CC license, and now she's lost all her money and is starving in a ditch. Just kidding. She doing fine and making a name for herself.
Law and court decisions are different from reliable economic data. Since we can not scientifically isolate and manipulate one economic factor in a real world setting, the data and analysis is subject to interpretation or manipulation. Copyright infringement is illegal and the courts enforced it. However, that is only proof that courts enforce the laws as written. Courts sometimes make errors. Look at all the people on death row who have been freed when they were cleared by DNA evidence. Why is it when some little person gets a huge jury verdict in his favor, people say, "The courts are crazy; those numbers are too large!", but when the courts awards ridiculous damages for copyright infringement, all of a sudden those numbers are supposed to be taken as sensible?

Let me clarify--I am not arguing that currant court rulings and many publishers see viewing something for free as a lost sale. You are 100% correct about that. I am saying that just because they say it doesn't mean it is true in real life. But don't take my word on it. Minecraft creator Markus Peterson says, "There is no such thing as a lost sale," and urges businesses to focus on attracting more sales rather than prosecuting imaginary potential lost sales. Minecraft's actual sales are still doing okay.
https://www.techdirt.com/articles/20110303/02203613336/minecraft-creator-says-no-such-thing-as-lost-sale.shtml
Sorry to be so persistent. I have been a huge proponent of the CC and open culture models for a long time, and I champion it whenever the topic comes up. I know many people are afraid of losing money, so I want to make it clear that they may not actually lose money. I am not saying they have to listen to me, but on the off chance someone repeats something to someone who makes business choices about these things, I want to do anything I can anything I can do to encourage people to embrace and open business plan. Also, Harvard Law prof Lawrence Lessig has written a great deal about this before he started focusing on corruption in government, and I think more people should check him out .
Allow me to clear up some details.
National and international copyright laws prohibit the public display of altered or unaltered copyrighted material. Period. These brave scanlation groups risk harassment, personal and public internet accounts being suspended or revoked, internet service privileges being suspended or revoked, civil lawsuits, and criminal prosecution to bring all of us the manga we love. Every time they upload, they take that risk. Groups that "get away with it" have either been simply lucky and flown under the legal radar, or have felt the brunt of their choices at great cost and continued regardless.
Licensing is a sub-division of copyright. The license holder pays upfront to purchase the "right to sell copyright material" from the original publisher. They can alter the material (translation) only with the permission and approval of the original publisher and artist. They make back the purchase price plus profit through sales of the materials.
This site boasts 10, 000 registered readers. If each "member" reads one, one volume manga for free, at an average cover price of $14.99, the publishers and artists, as a group, lose $149, 900.00. Most members read multiple volumes of multiple manga. This does not even take into account the non-registered members. The lost profits overall for the manga industry are astronomical - just for this site. Consider the number of free manga sites out there and astronomical becomes incalculable. One artist may lose "a few dollars", but the industry, as a whole, loses far more to "free advertising".
I'm not providing an opinion as to whether "free manga" sites are right or wrong. I am a registered member here with over 1350 manga read. It is not my place to make this determination. I am simply providing facts and information. My only opinion is that people should have information, so they can make informed choices.