Well, apparently they don't. They get nothing from chinese lezhin, have to pay fees that were not in a contract and pay ridiculous amount for not meeting deadline ._.
There's a petition to korean government to solve this issue ( https://twitter.com/kooo_gi/status/939171749102370816)
Well, shit.（/TДT)/ I don't read a lot of manhwa, so I'm not really up to date with Lezhin's issues. I only read their FAQ, which said the creators got paid.
I you are interested in a summary of lezhin issues, you can read it here : http://porifra.tumblr.com/post/168424485685/rough-summary-on-events-leading-to-lezhin-tax
Seems like lezhin is a shitty company who does not treat artists equally. I wanted to buy some comics from lezhin but until issue will be resolved, I won't do it, I would rather pay directly to an artist instead of supporting lezhin.
Yikes. It's pretty shady to try and profit off of translating manga/manhwa without donations from people or holding copyrights to the comics. It's even more shady considering the translations were from other groups/people. Lezhin may cost money, but at least the actual creators get paid from creating work for that site.