Which openrouter providers have additional refusal infrastructure beyond the model?

I'd like to see a list of these. Which providers don't just forward your prompt to the model, but do other stuff with it and sometimes return hard-refusals, regardless of any attempts by the user to change this? For example, pre-filling in part of the response and submitting a continue request still results in a refusal while the same model locally (or on another provider) would continue the story.

Part of what gives it away is the similarity of the responses but the real red flag is a complete lack of context awareness with regard to the things that are blocked, suddenly becoming susceptible to scunthorpe problems and the like.

• Lambda: Confirmed to do this.