Okay, before I log in there are ads. Probably. But I use very generic methods of adblocking so it is possible that some are blocked out even before logging in.
The things is: I support websites that I like. Still, I am dearly short on money - probably as long as I will need to finish my Ph D work. It's about 840 Euros per month (this is maybe 1000 USD) but that is really not much considering prices here. I am officially considered to be "poor".
I understand the need for ads on websites to cover bandwidth and stuff, but I hate "intrusive ads". That means, ads that actively mess around, like popups, flash (!) (-> flashblock.mozdev.org is one of my first plugins I install on every Seamonkey/Mozilla) or something like that. A silent, non moving image that loads rather quickly is fine for me.
Also an option is buying stuff at places which a related to phoronix, but then this is probably working out only for US citizens.
When I am at University and using lunch break to read phoronix news on a computer that I am not /root on then I notice a lot of ads but sometimes I even click them. I don't know if that helps because I am never actually interested in these links (most often browser games) or I also don't have the time. Also on my fav. German places for IT / Linux news (heise.de and pro-linux.de) I support them by leaving the ads or buying magazines or having subscriptions.