There's also a ton of multi sale per person in overwatch. Especially before role queue existed, it was easier to just spend 10 bucks on a new account to learn a hero than to suffer ELO hell while doing it. People are so toxic in competitive shooters, and playing at the ELO of your best heroes while on a hero you don't even know the abilities of is very very unpleasant. I struggle to think of a person I played with that didn't have multiple accounts, some with as many as 5-10.

This is to say nothing of the rampant cheating in the game, which if a person ever gets banned for, there is nothing stopping them from just spending 10$ on a replacement account.