The Android OpenStreetMap-based app OsmAnd has an intriguing scheme whereby you can register your OpenStreetMap account and a Bitcoin address and then receive regular monthly deposits of Bitcoin based on your contributions to OpenStreetMap.
Over the last year I’ve received the equivalent of about $16.00 in Bitcoin as a result.
Today I got my regular seasonal appeal from the Internet Archive for a donation; I remembered from previous years that they accept Bitcoin donations, and that I had some Bitcoin to donate, so I sent them everything I had.
There’s something about this that I find enormously appealing.