Probably because the 30+ million ps4 owners are too busy playing and buying games to worry about trivial stuff like that.
Close to 80% of sales for the new need for speed were on ps4 alone as are most of Ubisoft game sales.
Xb1 and Wii U are smaller userbases and libraries so of course they have more time to do that stuff.
That's my take on it anyway :)