I prefer free software not for its price, but for the freedom it gives me. Naturally I donate to these causes roughly what I’d have spend on a commercial one. They however do not need to know who I am, so I exclusively use crypto for that. I made one exception for an organization using paypal, and promptly they pulled address and name from that, gave it to a 3rd party which then send a postcard to me. You could see it as a nice gesture, but I think it’s just rude to use data in ways I did not explicitly consented to. Just take your money and leave me in peace.

In a similar manner I like to use it to pay for email, vpn, hosting and other online stuff. In fact this lemmy instance is 100% paid for by microdonations from its users, and because the provider accepts it directly no conversion was needed.