An article by Scott Collins in the Los Angeles Time discusses how brand new TV shows that started this fall are not doing well, HOWEVER:
"Viewers have turned out in droves for favorite returning shows, such as the high-school musical "Glee," which is soaring to record ratings in its second season on Fox."
So Meat's cameo role will be seen by many, many people
..and I wouldn't be so quick to discount any positive effect on HCTB awareness/sales; these things feed on each other, and any big exposure is good.
-Kathy