The frustrating thing is that more people would pay up for MLB.tv if they didn't have these stupid blackout rules in place. It's the way business is done in the industry, but I can't stand it. Let me throw my money at you, MLB.
Right now I have to hit Aereo for a good chunk of my team's blacked out games since I'm in a terrible spot for reception, thus I can't get it on my TV. They can still see me in their viewer metrics, and I am still adding value for their advertisers with Aereo. For the stuff I can't get on Aereo, I can sometimes find it on MLB.tv, but not always (depends on which network is the primary on the game and whether there are blackouts).
Sports broadcasting rights are a mess, and they're missing out on a lot of money by not doing something less stupid.