Anthropic not allowing Claiude Code subscriptions to be used with other projects isn't "pulling the rug out"; you paid for an API subscription to use Claude Code, and now you're using it for a different purpose and a different product.

If Tesla offered $10/month charging for your Tesla, and then a bunch of people turned around and use their Tesla Charge subscription to charge all different electric vehicles, and battery packs, and also hooked up a crypto mining rig to it, would you be surprised if they said "Nope, we're cutting this off. You can only use your Tesla Charge subscription for your Tesla vehicle"?