I’ve got some standing orders of 1 or 2 euros every month for bigger projects like grapheneos and kde. And for small apps that I actively use, I try to donate 5 or 10 euros now and then. It’s not much but I believe if everyone is doing their part we succeed in the long run
That’s a fair take. I can relate to the feeling of uncertainty. When I make small donations of a couple of euros I have to push away my feelings that the donation could be seen as insultingly low. It’s hard to judge what a “fair” price is. But after all, many donation buttons say “Buy me a coffee” so I would hope the amount is appreciated either way.