It just that most of the fanbase of games like Destiny were Xbox players last gen, it is changing a bit since the PS4 still has grown quite a bit compared to last gen but it still has its effects. For example I wouldn't touch the game with a ten foot pole. Actually seeing that the game sold 28% more on PS4 than the Xbox shows that PS4 locked pretty much every fanbase now. A quick turn of events, this is the UK we are talking about.