From a naive perspective, more usage should mean more revenue since customers pay per token. So why restrict it? If a third party is generating heavy usage, isn’t that ultimately beneficial for revenue and growth?
What other factors are they considering that are not immediately obvious? If I sold shoes, I'd be happy to sell more regardless of how many resellers are down the chain.
It won't just be Anthropic.
They are not limiting usage through the API with per token payment.
They are limiting usage through a subscription that gives you a lot (but they won't tell you how much exactly) of tokens for a fixed monthly payment.
Using models through a subscription tends to be much cheaper than using the API and paying per token.
Anthropic provides cheap subscriptions with less profit or even at a loss (we don't know) to promote its own tools. Using subscription for third-party tools obviously defeats this purpose.
Given finite server availability, my guess is that OpenClaw users were degrading the service (or start hitting service limits soon) for “normal” users, causing Anthropic to get worried that their cashcow in Claude would start to get negative press.