Board Thread:Support Requests - Getting Technical/@comment-3060206-20140716084130/@comment-452-20140717192200

I think you have your answer:
 * http://nitrome.wikia.com/wiki/MediaWiki:Wikia.js?diff=162569&oldid=162524
 * http://nitromepixellove.wikia.com/wiki/MediaWiki:Wikia.js?diff=9888&oldid=9887

The relevant passage: Not to intentionally [...] obstruct the proper [...] view of advertisements [...] by other users, including but not limited to changing or adding javascript or CSS changes [...] that would prevent the proper display [...] of advertisements [...]; Staff are known to be very picky about the "proper display" clause. Under this clause, they can disallow all changes to the interface. It is only through their permission that interface customisations are allowed at all. (Under the "proper display" clause, they have also denied custom backgrounds on the top Wikia bar, or for links to be added to the On the Wiki tab.)

It took them months of consideration to approve my request to add content to the right rail, I put what they told me into google, and found: Thread:581727. We're lucky something was posted in public this time.

While the public version is slightly different to what was said to me personally, the phrase "No module can ever be placed above the top ad." is exactly the same. (Please note that I have copied this phrase from the public version, not from the private version.)