Just want to quickly add my two cents on Webtoon's support program since people have already talked about most things you need to know.
It might sound like Webtoon's pledging program is easy money, but unfortunately it depends on the series and how good they do on the website too. And most of all, the program doesn't last for forever. In fact the Webtoon x Patreon program that Webtoon is offering right now for artists on Discover section (Not featured) will end in August this year. So you have approximately 7 months left to take advantage of this program. (Not counting the time you need in order to build up the requirement subscriber and views) So I would say for long term run, Tapastic and Patreon are your best bet. Unless you are lucky enough that Webtoon would pick you as one of their featured artist, which is a very slim chance but worth the try.