It’s like with VPN providers. Is Mullvad actually collaborating with law enforcement? They very well could be. It is a calculated risk.
Is DeepInfra actually logging and training or selling the logs? They could be.
They have been raided multiple times, tons of audits, does bleeding edge research on privacy preserving tech, donates to GOS, etc etc. You don't see this kind of VPN company at all because none exists.
Well I can't think of even one at the moment, to be honest might be biased but all Chinese research labs are largely oss except Alibaba now.
I am certain there are lots of American labs that claim to do it, but either they are marketting in hype since they aren't even close to the frontier or contrarily just don't make anything of significant value public/oss.