Its unlikely that Scorn would power down for CW prelims, why should he? and seeing as he wins it quite often he has no need to try to get into a different category.
What more than likely happens is that he, like many others cannot be bothered to sit at his computer for 2 hours while the prelims are happening. I certainly don't. Why waste 2 hours of quality evening time playing a game that no longer holds any interest because the Developers do nothing. I qualify in top 16 without bothering to change form so there is no way I'm missing primetime television. I also know I can't win and rarely make top 8 so mostly don't even bother with the later stages any more.

Lets face it, at or near the top the game is pointless, boring and a total waste of time.