How are people using so many tokens? I'm on the $200/month enterprise plan for Claude Code (because it's a better deal than the API pricing) and I don't come close to the limits.
If you use stuff like opusplan and /advisor so you use Sonnet for most of the work and only Opus for the really complex stuff then it's quite easy to keep costs low without affecting performance.
All new/renewing enterprise contracts with Claude Enterprise and ChatGPT Enterprise no longer offer usage-based subscriptions, but instead will charge API pricing for all tokens consumed, and as you've said, the subs are better deals than raw API pricing.
BigCo's are not using the plans we are using, they can't.