LOL, I highly doubt it will be a mass exodus. Baseball is terribly boring, the games are to long, the season to long, and the salary cap is out of control. Hint, the teams that pay the most money, are the ones that will make the playoffs.
I know a lot of people who left Dish when they couldn't get their RSNs. You may not like MLB or baseball, others are fanatics (same with the NFL, NBA, and NHL.) I'm sure Sinclair is not happy about their outlets going down, and one would hope the number of providers who have dropped them will send a message, but for me, I'm not into wanting my provider to take a stand to make a point, I just simply want what I want to watch on TV.