At least for me! I only found this opportunity few days ago when was invited to Project Wonderful group by one of BlogCatalog members.

Project Wonderful’s goal is to make advertising online a less frustrating and more impressive experience. Project Wonderful reinvents online advertising. They have made click fraud impossible. They grant advertisers the power to choose what sites their ads appear on - and publishers the freedom to choose what ads show up on their sites. They don’t have absurdly high minimum-payout levels. Project Wonderful team have made the entire online advertising experience transparent, trustworthy, and fair - as well as more profitable, for everyone involved! It’s why the slogan is “Everybody wins“.

Project Wonderful uses an auction to get things done, but one where anyone can be the high bidder at any time. They call it the Infinite Auction. Plus - if you join and look around - you can find tons of websites you can bid on and advertise for really cheap!