> If you want to offer support contracts and actually make people use them, don't use MIT. You can't have you cake (accepting public contributions and free labor) and eat it (sole profiteering) too.

I can't speak to how successful it is, but Daniel/Curl have been running with this model[0][1] for years. Probably not too different from 'drh and SQLite[2][3].

[0] https://curl.se/support.html

[1] https://rock-solid.curl.dev/

[2] https://sqlite.org/support.html

[3] https://news.ycombinator.com/item?id=49272832