Cerebras is jumping on a marketing faux-pas by Anthropic. I say this for the point you bring up about monthly session limits - no one on the Claude subreddit has yet to report being hit by this despite many going way over that. These are checks to deal w/ abusive accounts.
Because it hasn't gone into effect yet: "From August 28, we’ll introduce new weekly limits that’ll mitigate these problems while impacting as few customers as possible." [0]
[0] https://xcancel.com/AnthropicAI/status/1949898514844307953#m
[0]: https://xcancel.com/CerebrasSystems/status/19513503371867015...