the concept has many holes, nothing stopping being bought for friends, nothing to stop someone buying and slapping it on some other marketplace and silly prices, but tbh there is no way you can stop it, the system will be abused and those doing the abusing will get away with it, theres no way to make sure these get in hands of gamers, apart from turning up at their place and checking their system to see what gpu its got, but then theres ways around that, your dammed if you do and dammed if you dont imo
You are correct but as few are already finding out they can be traced and are loosing access to the MM. Is it worth it to make a couple of hunrded quid and loose the future chance of vouchers etc. Only you can answer that for yourself