I agree that the ads should be removed, but its probably very unlikely that this would happen considering Sythe probably gets paid for hosting their ads and/or has signed a contract for a certain amount of time.
Personally, I just ignore them and would NEVER even think of wandering over there. But for younger, newer, or more naive user, having the link right there could probably be a bad thing. But then again, if you are on Sythe and then you follow a link offsite to buy gold, you are probably an idiot anyways.