StubHub rakes from both sides of the secondary ticket market just because they can.
(plug: I'm trying to change this, slowly but surely, with my own project: http://www.boxrowseat.com)
http://articles.businessinsider.com/2011-12-01/tech/30462126...
Plus, as far as I understand it the settlement is a coupon award, meaning you get $1.50 back the next time you buy from Ticketmaster. So if you decided they were in fact deceptive and you don't want to give them your business again (difficult if you ever want to see another concert, I agree), you get nothing.
I'm not an expert on class action lawsuits but this whole thing seemed like it didn't benefit the consumer much, but was worth multi-millions for the firm bringing the suit.
We can all get upset about Verizon right now and spread the word very quickly in response to the recently announced change. It's much harder to foment a spike of reaction about ongoing bullshit fees at Ticketmaster.