[sebastiennight]

Yes I think that's the theory. I also noticed something today - when a stakeholder asked if Claude had an affiliate program, my instant response was "no" (because why would they need to deal with that) but a quick search surfaced that there are websites that actively present themselves as "Claude" official sellers/resellers, and simply act as a middleman proxy for the Anthropic/bedrock API.

It's unclear to me if they do this to arbitrage on API costs or to steal data, but it makes sense that Anthropic would be interested in detecting when traffic is being proxied to them.