I charge more per hour for my consulting, I had a bottle of wine that cost about that last week for dinner. What revenue do they actually get out of that model?
To be fair, they do much more work than CentOS ever did (or Rocky would have to do).
In fact, Ubuntu does too much development for its own good. People jumped on it because it was “a usable Debian updated more often”, and they got all sorts of crazy UX experiments.