I think we all agree that the 4/1 show was a big joke. But upon whom was the joke directed? Towards the people who are pissed at not finding out the identity of Cartman's dad, or at the people who actually enjoyed the show
Who is to say that Trey and Matt didn't get together and tell each other that some fans are so gullible that they can put out just any crap with their name on it, and those fans will embrace it and even call them genuises for doing it
And if that's the case, they certainly proved it, and are probably laughing their asses off that they can be called geniuses for putting out 1/2 hour of stupid fart jokes.
... "Yeah, I want Cheesy Poofs!"