Um they got 100,000 people for 2 Exhibition games? Thats more than the Rays would get in 3 playoff games. You are underestimating the Montreal market for baseball. Before the strike happened baseball was huge in Montreal and there has been a lot of time since the strike that I think people would forget about it and support the team. And even if you are not to high on the Montreal market, it is so much better than the Tampa market you would get an upgrade no matter what. Add in the fact there are 2 French broadcasting companies that would drive up the price of the regional deal as well as TSN looking for content and it would be one of the more valuable TV deals.
That would be a terrible idea. NBA would not work as there isn't one American NBA player that would want to live in Montreal in the winter. NBA players already don't like Toronto because of the winter and its 3x colder in Montreal. Add in a different language and higher taxes and it becomes the least desirable place to play in the NBA. MLB you can control players for 6 years so the system works but NBA players have so much control of where they play that the team would be stuck at the bottom forever.