brizzad

okay.. im almost done adding the affiliate section of my search engine. The deal is, you get tons of free, quality, targeted traffic for promoting my program. When affiliates sign up, they place a small search box anywhere on their site, for every search from their website, they get $x credit to their account to use towards bidding. Also, they get $y on each click in the search results, added to their account. My question is, how much should I credit the webmasters' account for 1)Searches and 2)Clicks?

thanks
im open to any comments/flames