User blog comment:Sannse/Your First Look at the New Wikia/@comment-473563-20100820004926/@comment-761251-20100820084348

The topbar and sidebar ad don't look anchored to me, I assume they'd scroll off the page; if they wouldn't, that would severely reduce article screen space to the point where we can't use large tables any more.

The suggestion that ads be removed from mainspace is unrealistic as that's where most of the pageviews are.