Doubtful, if you're using stole credentials you don't need to care about efficiency and you can just use whatever instances are available to the account. They

Doubtful, if you're using stole credentials you don't need to care about efficiency and you can just use whatever instances are available to the account. They're likely doing it as a way to control demand spikes because they have such a smaller pool of GPU instances to go around. Also, it prevents Joe Schmo from wasting one to run a web server because he doesn't understand performance and "just picked the best one".