Some of you may know that I run a game called Stroceta. You can check it out at Stroceta.net
Anyway, I have been trying multiple ad companies, the good and the bad. I just want to say, that the 2 I found the best were Adsense and Project Wonderful. The problem with Adsense is, it was only good for the first month or less then earnings went down to only $1.50 a day (When I was getting up to $6.00 a day!)
So, I switched to Project Wonderful, and after only about 4 days, here is my results:
http://www.projectwonderful.com/advertisehere.php?id=28359&type=2http://www.projectwonderful.com/advertisehere.php?id=28360&type=5That ain't half bad. Now here is the trick for all you Project Wonderful members or possible members. Run the adbox deactivated for about 3 days to 7 days to get your averages up, then set a minimum bid, I set mine to $2.50 on the leaderboard ad and $0.25 on the Button ad. What you should set is up to you, base it on your number of visits etc.
Setting a minimum bid makes the advertisers willing to pay a bit more than others attracted to your ad. If you set no minimum, people can basically advertise on your site for pretty much free. (Yes, I have done this myself I spent 10 cents on about 32 clicks and over 10,000 impressions, you can't beat that!)
Anyway, this is just my 2 cents. Project Wonderful is awesome, and the ads are quality, beats all others!