wareyaAnother way to keep smurfs from "wasting" beta slots is to use a better heuristic for smurfs. People can have multiple phones, easily. But they wouldn't spend hundreds of dollars on multiple accounts. If they also prioritized people who have a lot of value in their steam account, it would still work. In fact, that's probably what they would have thought of if they didn't have two factor authentication.
Prioritizing people based on their economic status.... this is very american I like this.