I have one question: In terms of fairness of distribution, would it be fairer if 5% was removed?
I believe 5% donation amount shouldn't be removed, but my views are 100% based from my own dev view.
I've done open source and I contribute to open source.
Got a lot of thanks, but those thanks didn't pay my bills, my time, etc.
Ask yourself, would you create something very useful (epic, actually) which makes people happy/solves big problems and get nothing in return, except users thanking you?