As was aptly pointed out by Brian Rose of ABC News, the presumably low attendance to the first reality tv show convention may be based on the realization that the reality tv show stars hosting the event are probably looking for another series.
Already famous reality tv stars are generally more bankable than their relatively unknown fans who may show up with dreams of being in their own reality tv series. On the other hand, if there was a unifed effort by all reality tv shows to promo the reality tv show convention, the result would probably have been much better.
I'm generally not a fan of reality tv because most reality tv is based on unrealistic living conditions. And if a show attempts to emulate realistic living conditions, to not pay those being profiled would be cruel, to pay them changes their situation.