Instead of setting a fixed price for advertising, our publishers sell advertising using our innovative Infinite Auction model. These auctions are like the auctions you're familiar with on sites like eBay, but with the difference that they have no set end date. Rather, they go on for as long as the advertising opportunity is offered!

To buy advertising on a site, you simply tell us what you want to pay and when you want to pay it. If you're the highest bidder, your ad is displayed!

That's really all there is to it. You can place and cancel your bids at any time, in real time. You're in control!

But it gets even better, with free advertising! Unless a minimum bid has been set by the publisher, bidding starts at $0, which means free advertising for you! If your bid is at $0, and you're the high bidder, you won't pay a cent. And no matter what you've bid, if you're the only bidder, you still won't pay anything until another bidder joins in!

Just tell us how much you want to pay.

Every bid you place is in CPD, which stands for "cost per day". A bid of $1 CPD means you're willing to pay $1 a day to have your ad displayed. Pretty simple, right? You can put time limits on your bid too: a bid of $1 CPD for a week means that you're willing to pay $1 a day for one week of advertising - so the most this bid will end up costing you is $7: one dollar each day for seven days. What's most helpful is that CPD is a rate, not a set fee: a bid of $1 a day that only lasts for 3 hours would end up costing you at most about 12 cents, since it's for such a small fraction of a day!

Your ad is displayed only when you're the high bidder. Any time when you're not the high bidder, you're not charged a cent. But don't worry: your outbid bids remain active until they expire, and can still become the high bidder in the future, when any higher bids have expired. This lets you set long-term bids on sites that capitalize on dips and lulls in bidding. And to make things fair, all these charges are to the nearest second. There's never any surprises.

You are not charged for clicks or displays - only for the time your ad is shown. This replaces the older CPC ("cost per click") advertising model, which is fraught with fraud and which cost advertisers $800 million in fake clicks last year alone. With Project Wonderful, click fraud is eliminated entirely, and advertising becomes a more profitable and reliable choice for you!

And you're always getting the best deal. Like most auction sites, we use proxy bidding on your behalf. This means that if you can win the auction without bidding your maximum bid, you will. For example, if someone else has bid $1 and you've bid $5, your bid will only be increased to $1.10 to outbid them and become the high bidder. Your maximum bid is never revealed to others, and in case of a tie for high bidder, the earlier bid takes precedence.

We've set up a few examples showing more about bidding and a few auctions in action, so you can get a feel for how bidding works in real-world situations. Check it out!

Opportunities come to you.

You can use our powerful search engine to find publishers that meet your criteria. Or, you can take it one step further and set up Ad Alerts for any search criteria you choose. What are Ad Alerts? High profile sites like Reddit can send tons of traffic to websites for only a few days, giving any ad space on these sites a much greater profile. Other ad networks are too slow to react and won't let you capitalize on this, but we do: search for sites you're interested in, set up an Ad Alert, and you can get emailed right when any site on our network is linked to by Boing Boing, Slashdot, or any other website you choose. You don't even need an account with us: just start searching, enter in your email address for an alert, and you're good to go!

You can also get alerts by RSS if you want, and you can chose to only be notified when hit or bid values reach certain thresholds. When there's a new advertising opportunity that meets your criteria, you'll know about it right away.

Leverage our powerful bidding technology.

We've stepped you through how to bid on a single site, but we also offer our unique campaign technology. With campaigns, you can even bid across thousands of sites at once. Campaigns do your bidding for you, allowing you to place literally thousands of bids in seconds -- and they're all according to your directions and criteria, and within your spending and performance limits. You can control advertising across the entire Project Wonderful network.