It was really just not a good idea. Stayed up too late, looked at my PayPal and was like "oh I have a moderately successful project, let's see..."
I admit that it wasn't the best idea, and even last night I was slightly worried about how the forum management would handle it. I've removed the forceful agreement and I'm more considering a, well, who knows. Maybe I just will keep working on this project without focusing on money, since that seems to cause issues.
I doubt I'll be putting an agreement back into place. Rather, if anything, it would be a bit of "hey if you're making a lot it would be really cool of you to throw some cash my way heh" than anything.
I don't want to drive away any users and that's exactly why I was really quick to undo this poor decision.