well i'm finally starting to get some decent earnings from advert, I've got $5.76 on google adsense now and $0.89 on adbrite, so I know which is my favorite, although you need $100 before adsense pay out! so i've got a while to go yet :(.
I now have $1.70 with adverbux, they have some offers and action ads that are really easy to get credit for. a couple are for downloading a toolbar for IE, but you aren't forced to keep it. Also I've discovered their paid arcade, they have lots of really good games and you get paid to use them, i even got second place on the scoreboard for one game and got 50c bonus! even if you don't want to join a ptc site you should check out adverbux just for the games.
Advercash always has a decent amont of ads and i have $0.97 so far, but with no referrals, they also have some offers which are easy to complete, there is one which pays $5 and is free to do, I'm just waiting for it to be aprroved now. Bux.to is a site some people complain about, but i'm nearly at payout so I'll let you know if they don't pay me! I have $8.25 and only 1 active referral. if i had more referrals I'd get to minimum payout faster!
i have $5.49 on clix4coins. they don't have many ads but each pays 2cents a time or sometimes 3! Clixmania has only got me $0.5950 so far, but i have no active referrals.
Clixsense doesn't have that many ads, but sinse I have quite a few referrals I am getting towards the payout. i have $6.44 now. hits4pay seems to have less ads now but i still get 1-3 a day and have a few referral clicks, I'm up to $20.80 ! paidvg have started a draw to win premium membership and referrals, during the paypal crisis i bought a ticket for $1 since i wasn't sure i'd get paid anyway, so i'm at $1.06 now otherwise it'd be $2.06. they still haven't draw the winner for january. finally on titanclicks i'm on $0.715. so you can see which sites are the quickest earners. I am earning more each day but I don't want to spend any money on these sites. A few of these sites let you buy referrals (with no garantee they will be active!) so if you have the money you could buy referrals and make money alot faster. I'm waiting to get a pay out, then I'll maybe put 50% back into the sites.