> CF could have kept coasting on what Astro was building, but instead they are paying for it. But in return they get a lot of control.

Supabase pioneered the modern implementation of this model. Probably, RedHat before it? Google also tend to "acquihire" maintainers of popular FOSS projects, like Ben Goodger (Firefox), Scott Remnant (Upstart), Junio Hamano (Git), Guido von Rossum (Python).