These so called players will cheat for a penny. Most poker sites
have these so called players, with multi accounts, but with the help of the administration of different forums, in their private games, see a possible double account using more than one in the game, can report it to the poker site, and rest assured, the top poker sites will and do look in to it. If they find it so, and I know for fact, they will shut all their accounts down and remove all their money. Even a player can report it and they will look into it.