This is unacceptable for paying customers.
Either 1) infrastructure for paying and non paying customers must be separated, 2) excessive load must be ended by not offering the free tier anymore or 3) they must fix their broken monolith but they are seemingly incapable of doing so.
It very well may be that the paying customers are actually the problem. Those can actually afford to throw enough money at AI providers to significantly increase the number of commits & other actions.