Killzone: Shadowfall has around 1000-2000 people playing online at any given time. Compare that to battlefield 4 PS4 which has 40k-60k people playing online and lower sales. Article is probably right. A ton of people are likely getting the killzone ps4 bundle because it's the only one they can find and they have no interest in the game.
Ryse's trade ins are probably because a ton of people are buying it as a graphics showcase title for the new console and realizing that they don't like the game and are probably never going to play it again after finishing the campaign.
Sony and Microsoft both dropped the ball on their launch titles. They are very lucky that people are so anxious about next gen that they are willing to drop $460+ just to play what they already can on current gen consoles with prettier graphics. (Assassin's Creed, Battlefield, Fifa, & CoD)
