Wullie's absolutely nailed it with both those posts.
Even if there was a subscription service for overseas fans, it'd only be a matter of time before fans/pubs here found a way round it and joined in watching.
There's also little doubt in my mind we wouldn't be pushing 50k at home if every Championship game was televised. Last time we were down I only missed about four home games, just buying tickets on a game-by-game basis, because it wasn't just a case of turning the laptop on.