They just lie to virtue signal. Send them an email and explain you are trying to donate about 3 BTC - see if their story changes (I bet he will privately send you his bitcoin address). 



> We accepted the justified criticism about crypto's effect on our planet

Lol what?

It sounds like for now they still need to have a bank account. I bet if they went to Bitcoin only (no crypto or fiat) they would get a lot more donations.

Like Mozilla. They have a mission but in all other topics even if it is closely related they are mainstream. I would even call it cognitive dissonance to favor open source software and privacy, but on the other and reject private uncensorable money.