Ads pay for the site, and there's a lot of sites with the annoying mosquito one...
I would just refresh the page, chances are a different ad will show up on refresh.
LEFT4DEAD411.COM
Bet with disolitude: Left4Dead will have a higher Metacritic rating than Project Origin, 3 months after the second game's release. (hasn't been 3 months but it looks like I won :-p )