in the past, programs i used paid 10% more if they had traffic leaks to make up for using our traffic for their own sales.

and in addition to using affiliates' traffic without paying for it, there's another issue i sometimes have with traffic leaks. i reviewed a site last night that had more links on it to DVD sales than to join the site. and you could easily get confused and annoyed by these and end up leaving the site if you didn't want to buy dvds because surfers could easily end up at a DVD sale page over and over without meaning or wanting to.