Demotivation is a feature, not a bug. For some things you do need discipline, but bear in mind it's a safety switch to keep humans from wasting their time. Per

Demotivation is a feature, not a bug. For some things you do need discipline, but bear in mind it's a safety switch to keep humans from wasting their time. Personally I've always done it for the fans. The people who take the time to fill out the surveys with lots of thanks or write articles about how much they loved my app. Or the people who drive to the next city to transfer money (because we didn't support card payments then) and then tell us to keep the change. It's more than just "signups and revenues", it's more about not letting people down.