Earlier quoted context omitted.
Please stop painting open source as a donation-based development model. That's completely distorting what it is about.
Okay? This particular project is soliciting donations: “Support us with a monthly donation and help us continue our activities.” I’m not really sure what your point is, because you never actually made one. You just said I was wrong.
- Stable income vs. unplannable amount of bounties
- Bounties generally don't cover general maintenance work for a project (e.g. updating dependencies)
- Bounties (as they are implemented today) generally only pay the contributor, and not the maintainers, which can also have significant cost in reviewing a feature
- Bounties traditionally have been so disproportionally small compared to the work required that they don't come close to provide a reasonable hourly rate for contributors
(I think you'll find enough articles that go into more details on the difference between the two.)
Bounty platforms have been around for ages, and I don't know a single project that is able to finance itself from that. Even for the OBS example you mentioned, it the bounty was a good way to get the ball rolling on a specific issue, but the overall maintenance is still financed by monthly sponsoships.
One-off donations might be a nice supplement, but they don't form a solid foundation.