@SupaPhly part of the reason could be that they are more responsive to FOREX fluctuations than MS or Valve. The other reason is that we are so small for Sony that they can't be bothered to match what happens on the other platforms.
If you have both consoles it allows you to price shop, i've picked up a few games this way.
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Star Fox Zero First Print Edition
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A high-octane interplanetary dogfight!
An evil empire has risen and the Lylat system is in danger. As legendary space pilot Fox McCloud, blast through an onslaught of enemy forces to bring peace to the galaxy. In this white-knuckle space shooter, it'll take more than luck to master the Arwing jet, the Gyrowing flight drone, and the Landmaster tank! You have what it takes. Now prove it.
General Pepper needs your help! Use your TV's cinematic view to fly and identify targets and see through the eyes of Fox with the Wii U GamePad's screen as you lock onto enemies and fire. You'll also have to use advanced flight techniques like boosting and barrel rolls to survive the relentless assault. With the help of the rest of Team Star Fox , tackle missions in the air and on the ground in a variety of planets teeming with enemies. Then engage vast armadas of powerful ships in outer space dogfights. Master your craft, defy the odds, and earn your face-to-face meeting with Andross. Only you can restore peace to the galaxy!
The First Print Edition includes Star Fox Zero, a SteelBook, and Star Fox Guard.