As far as subscriptions go Wow would of seen even deeper losses of subscriptions if not for LFR.
You are the minority. The Majority support the game that produces the content. If they remove LFR they have to make content for the majority to keep them interested in the game. They will pull way waaaaaay back on raid content if LFR goes away (which it isn't). No LFR=Far Less Raid content Less often.