Volunteer recognition
OK, I think you're on the verge of convincing me, FloNight.
I agree that there's a definite problem with finding the man-hours to actually assess people for recognition-worthiness. After all, we really want people spending time contributing to project content. Not meta or parallel stuff that could be regarded as tangential to our aims.
A lottery does seem to be a good way of relieving the burden of having volunteers spending hours and hours running through someone's contribs. Although it does occur to me that, currently, checking someone's contributions is a little slow; you basically have to click through from one to the next. If someone were able to bring up, say, 50 contribs at a time (showing the actual edit content, not just the summary) then that would be a valuable tool for assessing what a user has been doing.
I don't really have a firm or fixed position on this.