I s'pose. I think paying your way into the beta is too much though. As much as I was PRAYING for a key, I'd never go as far as throwing money away for one.
I suppose you could say that paying for the beta key is the same as paying for the Collector's Edition for no reason other than playing 8 days early. And that costs more than the, what was it.. like $7 to register on FP?
People have done crazier thing. I personally would never drop thousands of bucks on a Frostmourne replica, lol, but there ya go.