There is no other reason to require KYC for a server-side text transformation tool, no matter how impressive it is.
And another could be EU requirements for age verification. AI can produce adult content.
There are may be other reasons, like to prevent using OAI models' output to train competing models.
They should realize that anything can produce adult content. Anything.
Anyways, competitors do not require KYC for text transformation services, and that's how it should be.
So I don't think implementation costs are an obstacle.
Because then the NSA shows up with an NSL, you integrate with the fascist surveillance state or you lose your business. How have people forgotten this so fucking quickly?