Well you're right in that PS3 started to outsell the Xbox 360 towards the end of its life cycle but one could argue that the reason for that is because everyone already had a 360. Did they ever surpass the 360 in total sales? I'm not sure they did. I've seen that 3:1 ratio also but I think that's solely between the Xbox One and PS4. Regardless, you asked how more people can be on Xbox Live than the PlayStation Network if this were the case. The answer is simple: online subscriptions =/= consoles sold. You don't have to get an online subscription in order to play the system. People say that competition is better on Xbox Live for PvP play (maybe not necessarily for Destiny) and maybe it is. However, IMO, that's only because the pool of players is much larger. It's always been that way and despite console sales, I don't see it changing anytime soon. Someone said earlier that people only get an Xbox because their friends have one but either that be proving the point that more people are on Xbox Live?