They have a few ads, true, but they are actually relevant. It's better than having an email account which gets flooded with porn crap and on the side are blinking ads which want you to buy a jeep liberty, for instance. At least the ads would be porn-related, this way if I'm actually interested in the porn message I've recieved, the ads will be interesting as well, plus they do not blink/flash/animate which is annoying. Personally, I love the AdSense ads. I've even requested that Opera developers leave the AdSense ad functionality in the browser for paid users because I love getting ads which are related to the documents that I'm reading, it's helped me a LOT. For example, a few weeks ago I was looking through some documents about fairies for research on a game I'm wanting to make and the ads gave me links to pages which were more relevant to what I was looking for than the page I was actually looking at. Nothing beats advertisments which aren't in your face saying..
"BUY ME. YOU PROBABLY DO NOT KNOW WHO I AM AND I DON'T KNOW WHO YOU ARE, BUT I KNOW THAT YOU HAVE MONEY AND THAT INTERESTS ME!"
Anyways, if anyone is feeling generous then please send me an invite (megamanxplosion@hotmail.com)