A lot of people here have not enough money to spend it like crazy on this official sites BUT as the uploader mentioned it: It doesn't cost you anything! It's FREE, you only need to watch 30 Adds (most of it are 15s or less) and with the generated amount you can buy yourselfe any Chapter you want.
Assume you have 10h a day where you must not use your phone -> this means you could generate 3'000 Coins which is equivalent to 10 chapters, 10 FREE chapters a day. This would mean so must to the authors, so please don't be so selfish and think about the creators!
So whenever I like a story I always try to support the creator bc they get about 20 cents per chapter and they work 8-10 hours a day every day. They have to survive as well.. like pay rent, buy food and pay bills. If I can help someone to stay alive and create content I like without having to pay any money (that I don't have) I don't see the problem to do so.

I’ll still be reading manga,Manhwa and manhua here since im broke i will only stop if i can get my own money or get sick of reading(which will never happen)