I think in the end, they demonstrated that the fetal stem-cell movement is driven by profit as much as by human concern. Obseve that Cartman was just trying to use them for his personal gain all along, and apparently had crocodile tears for Kenny.
Dude, it J-U-S-T W-A-S-N-T F-U-N-N-Y.
Like I said, I won't even try evaluating whether it promoted fetal stem-cell research, or it ironically ridiculed taht cause. (I tend to think this was promoted FSCR, while the Reeve one had the opposite effect.) But the point is several minutes would pass at a clip without there being one joke.