Re funding Strawberry going forward - Lyrion (LMS) have raised a tidy sum (more than their target), to support hosting costs, development, etc. via the Open Collective initiative. Monthly subscriptions (currently suspended) and one-off donations are simple to do. (I've done the latter.) See https://forums.slimdevices.com/forum/user-forums/general-discussion/1731033-announce-open-collective-fundraising-initiative if interested.
I wouldn't object to a discreet 'Donate' button (maybe in the main interface menu bar?)