I currently do not have the ability to donate, but I will once I do.
CW: opinionI believe FOSS developers spending time to maintain something I (or others) use should be paid for that time, especially if it’s their free time. Possibly off-topic, but I think, even if you donate to them, you aren’t automatically entitiled to a FOSS developer’s time. It’s your privilege to use something they made in their time for not you, and you have no right to demand them to change anything about it, so you should at least have the decency to be nice.