Stake violates their own rules all the time so why should the players obey them?
sure they can ignore the ToS but then again they are the one who is risking their money by buying the account. I know you have something against stake.com but the ToS is being brought up as a reminder for the OP and whoever wants to buy it that they could lose the account by breaking the ToS, not to mention the risk of being scammed by the seller.
^ How the Stake.com determine if there is an account that has been changed hand like OP wanted to sell his platinum account.
It is possible when the IP address changes? probably that is the only way they determine a sold account that is violating the ToS. Changing hands like wagering are normal and it will change. Second, probably a device that was used? is that right? It is very risky, you buy nothing if your account will freeze including your fund that has been deposited.