Are you talking about the short single line of bold text right below the banner that says "Buy (gamename) here" and has a link to the order page? If so you really have a chronically low tolerance for this stuff. Do you complain about all the labels on the cans at the grocery store too?
I wouldn't even call this an ad. It's just a conveinent link to the order page. This isn't a free site like spaceempire.net, they are trying to run a business here.