It's not impossible that the separate agreement in question imposes light limitations.

I think one of the initial reasons why otherwise open source models started with the limitations on model-as-a-service use cases was because of quantised or entirely different models being served as the model in question on open router, and they needed a legal method to limit that. It might just be that, thought it might also be the direct opposite, hard to know.

This doesn’t stop any company spinning it up for their internal use. It only bites if you try to resell it.