Peer-to-peer means there isn't a third party involved, and BTC stopped being electronic cash around 2014
Yeah, but ideally you should make a donation of lasting value.
That's what BitPay handles. The OpenBSD Foundation doesn't hold onto any Bitcoin, it's immediately converted into USD.
Almost every donation and purchase I have made would have been far more lucrative to the recipient had they kept it in BTC. But yes, I understand this is salty HN.