Anthropic also does this because they will dynamically change the limits to manage load. Tools like ccusage show you how much you've used and I can tell sometimes that I get limited with significantly lower usage than I would usually get limited for.
Which is a huge problem, because you literally have no idea what you're paying for.
One day a few of hours of prompting is fine, another you'll hit your weekly limit and you're out for seven days.
While still paying your subscription.
I can't think of any other product or service which operates on this basis - where you're charged a set fee, but the access you get varies from hour to hour entirely at the provider's whim. And if you hit a limit which is a moving target you can't even check you're locked out of the service.
