There was a blog by Jason Lax, I think, few months ago regarding changes in the Wiki points. The points were way over-inflated (which I pointed out in the comments to that blog), but I believe that is (was?) going away.
Based on what I've seen in ABAP wikis you don't really need to have an idea to create one - just copy-paste a code sample from ABAP Help. Honestly, can any ABAPer tell me what value does this wiki page have, for example? Other than author (multiple authors, actually!) getting the points for it.
More than anything Wiki should be a point-free zone, really. There seems to be no moderation or control whatsoever.