I'd have thought you would make more for the charity if you paid the users a higher percentage. That way you would bring in more users, providing you with a higher overall return.
New to this forum, hoping to bring something good to the table, I'm working on (hashing out) a few ideas for BTC (who isn't??)
Hoping for whitelist if possible as I'd like to talk to a few people here, I'd also like to reply to a few existing threads! <-- That last one is killing me!