I was genuinely surprised how good the story is--definitely expected not to like the premise or the girly vamp, but I'm intrigued and delighted so far :) Hate to say it, but, as good as it is, the posts on aggregator sites should probably be limited to these first five chapters (a free sample of a kind). Less than a dollar is reasonable as the average tanko/graphic novel usually runs $6+, and the average book length is six chapters; not to mention the chapters are ACTUALLY AVAILABLE IN ENGLISH (for once, you money-grubbing, no-translating, twitchy-bout-fan-translations major publishers).
For that Korean vampire webtoon, the translators got permission from the author to translate unlocked chapters.
The difference here is that there's no need for translation, so we can read unlocked chapters from the website (unless this website never unlocks further chapters, then I understand the point―even if it is unethical).
We also would rather read translated manga free here than buy the English licensed versions. Those are more expensive, but the principle is the same.
I checked the website and its only the first chapter that is unlocked; the rest are locked. I was surprised actually to see the unlocked chapters there!
although, you may have a point; the scanlators may have just asked for the author's permission to upload the locked chapters into the site! :)
its good business to become popular in a more accessible site even with it being kinda free! heck! I didn't even know about that site before reading this!
I understand that there would be people who would rather just wait for the free versions, and its ok. :) I'm not really forcing anyone to buy it. haha! I just wanted to somehow inform people on how we could support the community. :)

so this is actually a "paid comic" online. I hope people would support the artist and at least buy some of the chapters of the comic so that the artist can make more! :) each chapter is actually very cheap and there are already a lot of updated chapters available! each chapter is less than a dollar. I hope we can show our appreciation and support to these wonderful people who give us these comics!
http://www.lezhin.com/en/comic/bloodbank
there are also a lot of other great BL comics in this site!