Because the games bought on steam just unlock the game inside Ubisoft Connect - steam is just a download manager at that point. You still technically own the pr

Because the games bought on steam just unlock the game inside Ubisoft Connect - steam is just a download manager at that point. You still technically own the product on Steam, Ubisoft can't change that - but since your associated Ubisoft account doesn't exist anymore the game won't launch. I'm not saying it's great, just explaining how it works behind the scenes.