It seems as if PETA made certain their ad would be banned. They likely prefer to not pay the rates for a Super Bowl Ad, but rather to have a viral internet hit. They got O'Reilly to be outraged over their ad (last night), and to play much of it on his show - all the better for them (and all the better for O'Reilly's ratings: he and PETA use each other for mutual benefit).
The humor is what makes these vignettes good. Content warning.
Memories: MKH's video response to Alicia Silverstone's PETA ad.