I only think those that have high priority points and have access to some of the better seats are truly turning a consistent profit on their extra stubhub seats. For example I know a person that sits in club seats and has more than 8 additional prime seats on the east side. He sells the east side seats for every single game and turns a pretty good profit by the end of the season that helps pay for his club seats. I know another person who's family sits in the club, and they also own seats in the west side lower bowl. Just like the first person, they sell these lower bowl seats for every game and make enough profit to almost completely cover the cost of their club seats. It's absolutely infuriating.
Unfortunately, these folks wouldn't be as motivated to stop doing what they're doing, even if they stopped getting points for their extra seats.