Is this legal for Anthropic to do? The whole thing screams fraud / rug pull.

The amount of compute you get is not documented anywhere.

Cursor docs do say "You get $70 of api priced tokens on $60 tier"

Anthropic limits were 8.33x with free cached tokens, but those numbers themselves were a leak rather then an official statement

It's crazy to me that this is not considered fraud. You sign up for a yearly plan under a given assumption of functionality, then they just change the terms to give you less than what they agreed to without compensating you in any way. That's textbook fraud.