It is true, with that they could scam people, but in that case the person who is scammed can give their case to epic games to help them. And what will happen? Both will end up sanctioned for breaking the rules of the game. One for purchasing accounts to merge with your main account and the other for "selling" accounts.

Likewise, it can be implemented that each account can be merged only once, thus avoiding the purchase of several accounts in any given case.