Contracts means shit if they are not enforceable.

Ask yourself

1. How would you know the provider has violated the contract?

2. How could you prove it?

3. Why would OpenRouter take your side in this (unlike your example with OpenAI, you're not a signing party)?

4. How would OpenRouter enforce the contract after all three above are somehow resolved in your favor?

IANAL, but IMO it's all a legal theater.

EDIT: formatting