TV stations give the actual campaigns, vs outside (superpac) money, a better deal on advertising.  Here’s an example:  for a 30 second spot on a local channel, campaigns are charged approx  $200.  Non campaign super pacs are charged approx $950 for the exact same ad time.

Obama’s advantage is he has a big lead in actual campaign money.

Further the Romney campaign has changed its message so many times the superpacs have no lead to follow, thus their message has been all over the map.

So, uncoordinated messaging and far less bang for the buck.