Ohhh... you're using the word platform to refer to only their web UI/website. I think that's confusing because when you say platform, I, and perhaps others, hear both the web UI and API, not just the web UI. Eg if someone is on the Stripe platform, they're using both the website and the API they provide. Since both of those things are run by Anthropic, I think of both of those as one platform coming from Anthropic (that they charge differently for).