Yeah,the one thing I would say about that is that if you agree, you really gotta give it a shot. Which can be more drudgery than you think. Which is why I deleted the email. I can’t commit to something like that, and doing it without a commitment is unfair to the team.
That said, I’ll bet they take beta testers with the assumption that 60% of them won’t pan out. I’ll bet they get 95% of their useful feedback from 1% of their playtesters.