User blog comment:Cyan Wind/Featured User of January/@comment-24196726-20141021211545/@comment-25297120-20141022040236

The main reason makes me not count Challenge Patches is exact like the situation right now. Challenge Patch articles of Khan Academy Wiki are not well-developed enough. There are lots of missing articles and people may gain lots of points from this loophole.

I need to overhaul Challenge Patch articles first, then we will be ready for looking for the rest in December.