At Admin Panel -> Settings -> Sponsorship, WSN Gallery offers you a choice of PPC search plugins you can call results from to make some extra money. If you don't care for the Search Feed and Revenue Pilot options and you know a little PHP, you can add a new one.

Just go to your /searchplugins/ directory and make a copy of searchfeed.php, renamed as yourchoice.php. Open it up and change the functions in it to call data from your provider. The option yourchoice will automatically show up on the menu in your sponsorship area.

Please consider contributing your new plugin back so that other users can benefit from it.