I'm not commenting on the acting (being good or bad) but I don't think that sums it up. It sold on some hype, like Blair Witch. The acting is what you see after you've bought into the hype.
By selling, I was referring to the studio that picked it up. I was addressing grinner's claim that a show with bad acting will not sell, "period." That claim undermines his own argument that PA has bad acting, since the show DID sell and went on to gross $123 million.
So either PA has good acting, which would make his first claim wrong. Or a show can sell despite the bad acting, which makes his second claim wrong. It's one or the other (or both- which is what I'd argue).