Originally Posted by After Shock Media

You use ccbill from what I can tell.
CCbill has a cookie time length that the cookie remains valid for. Cookie determines who gets credit for the sale. I.E. when someone returns to the site will the webmaster who originally sent them still be credited.

Now that you have a store on the inside of your members area, this begs the question on how webmasters will get credit for the sales that the members they sent, specially if they happen say two months latter or four months latter as you add in new zip files for purchase.