You've sold out when you became VC Funded... It's just a matter of how long the free punch lasts.
What, are you expecting them to just work for good vibes?
To be fair, this is the best thing that can happen for the founders. I don't blame them.
It was either they (literally) sell out or enshittify. Choose your poison. Hosting and running LLMs is an expensive business to be in. There wasn't ever going to be a good ending to this story. The original investors need to be made whole.