Markus Persson aka Notch from Mojang has stated in a recent interview with PC Gamer that he's still leaning more toward subscriptions for his space title, 0x10c. But in an interesting way that not everyone has to pay. Basically each ship in this universe will require a generator to keep it powered and Notch is going with, "one subscription gives you one generator."
So if you have the captain subscribing or even anyone on the ship subscribing, then everyone else aboard can play for free. As long as someone subscribes the ship shall sail! Er.. fly? It reminds me of the VIP packages you see every now and then in free to play games where if you subscribe, then everyone in your party gets the benefits you do. I like the idea personally, even though I haven't jumped on board for any pay to plays recently. Plus I mean what if you get a group of friends or clan that all chips in for the subscription, then it'd be like nothing. Assuming it's not above $15 a month or something.