What manga websites/apps give free coins/currency?

I can’t buy any manga with real money, but I’m willing to get on everyday to get free coins.
I know LezhinComics gives 3 free coins every week, so I use that to buy Painter of the Night, My Suha, and I plan to buy all of Star x Fanboy. (I’m able to buy the other mangas if one of these stories are on hiatus lol, but it’ll take forever)
Before I found out about this, I made the excuse that I couldn’t support the author. Now I wanna know what other sites give free coins, plus I don’t know too much websites that I can purchase manga from. (Lezhin Coins given on Monday, Wednesday, and Friday)