I was a game tester myself for a year at EA games. Got to work on ME2, Madden 10, and NCAAF 10, among some others. Just giving this as a point of reference. So I am sorta familiar with that side of things. Never heard of people brought in and being paid to test a game once it hit its Beta stage. Typically at that point. Typically betas are open/closed, but to the general public. There are far too many people that will gladly do that stuff for free.