Complex sentence: Projected listenership figures dropped thereafter, largely attributed to the show's hiatus for the rest of 2006, though an aggressive internet marketing campaign--primarily centered around the popular MySpace community--resulted in the show's zenith of more than 5,000 listeners in December 2006.
Split into simpler sentences: Projected listenership figures dropped thereafter, coinciding with the show's hiatus for the rest of 2006. An aggressive internet marketing campaign--primarily centered around the popular MySpace community--resulted in the show's zenith of more than 5,000 listeners in December 2006.