According to gameinformer and reddit, destiny's silver and the TTK expansion dominated PSN sales, only non-destiny item in the top 5 was a minecraft expansion thingie. It's also the most-watched console game on twitch. There's just no denying that Destiny is big. Sure, there are people leaving, but there are also new players and the actual playerbase (while it surely isn't anywhere near 27 million) seems to be big enough to keep the game alive and kicking.