> $500/month for a service like this?
$500/mo sounds like peanuts for what a service like this provides. For a business that would use this type of information (e.g. TV shows like Daily Show or Colbert or a political campaign) it's both worth more and cheaper than doing it in house. The power bill alone for all those TV-tuners/DVRs would be more than that!
I'm surprised that it's not more expensive.