Check out the price tags at the bottom of the link!
http://www.uae-embassy.com/Visas.html
These guys are off their nuts! I can buy a residence visa for the same money as a 6 month multi-entry visa. I can tell you for certain that I know of two large oil companies that are no longer paying for visas for their staff here, nor are they doing meetings here anymore. It is easier and cheaper to visit Russia than here.
In the 3 years I have been here and the 9 my brother have been here, we have had no less than 50 multi-week guests (there was a wedding), and hundreds of 2-5 day guests. With the extortionate cost of flights from Canada to DXB, coupled with the expense of being here...I cannot see people splashing another $250 (min) to $500 to visit. The 6 month multi-entry is a joke as well, seeing as you can only stay 14 days. Obviously trying to avoid visa runs.