There's this thing called demo mode
it lets you play the game
WITHOUT A KEY
Yeah, demo mode.
dem·o/ˈdemō/
Noun:
A demonstration of the capabilities of something, typically computer software or a musical group: "we hired them to produce a demo tape".
I paid for the capabilities of the product. Not to mention, the product is advertised as a lifetime subscription, and since the EULA says that
The term of this license grant is perpetual.
the lifetime subscription can not be ended for any reason. On top of that, the word 'ban' holds no meaning in court, it's not legally sturdy. Other, solid, terms use words such as "terminate" that do actually hold legal value. So not only would that not hold up in court, he's violating it by revoking the key in the first place since he is literally preventing you from using your purchase. On top of this, End User License Agreements themselves aren't legally sturdy and there has been no American ruling or law concerning their validity. The entire thing is flimsy, and no, you are wrong about this one. I guarantee it. I am not and will never be wrong twice in one day.