[bloomingkales]

They could embed the subscription level into the blind signature.

[dgacmu]

But they still couldn't do accounting / query limiting for users on a limited queries per month plan. So you could do "yes you have assistant" or "no you don't" but their $5/month taster plan has a query limit.

[bloomingkales]

Yeah, I guess the only way would be to keep reissuing an updated embedded signature with updated query count.

I don’t know the cost or liability of that at scale.