It's best to trust God and help those in need by lending money with 0 interest, when God says that he will return much more than you lend others back to you one way or the other, you just have to trust him enough, you know.
Man... I don't think it's good to bring religion in this discussion. It's up to the lender if he want to lend with interest or not, even @OP lend with interest, I'm not sure if he's really make money from this service as there were many users scam him before.
Even banks also ask interest and they're more aggressive when the borrower can't pay his loan.