So to start, I am not a target user of this site (at least at the moment), as I am not very active on github and I don't follow open source projects very closel

So to start, I am not a target user of this site (at least at the moment), as I am not very active on github and I don't follow open source projects very closely. With that said, I have followed these discussions, and I think this may be the wrong approach. I think that you should implement a balance transfer feature. This would prevent a lot of the money from getting eaten up by processing fees. Once that is implemented, you should just leave the amount up to the user, no mins, no maxes. If someone thinks that $0.25/wk is too small, then they are free to tip more. But at $0.25/wk, that comes out to $13/yr. At $1/wk, that is $52/yr. I am a man of modest, yet comfortable means, and giving some people ~$10/yr to support their cause is well within my discretionary budget, but at ~$50/yr, that starts setting off my internal 'frugal' alarms, especially if I want to donate to more than one project.