@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.
Mirai is suddenly pierced by a red arrow from a god candidate who just happens to be the girl he has a crush on! Now under her control for the next 33 days, what will happen to Mirai? And what is the mysterious Metropoliman really up to...?