Yes they do, just not as many generally as other affiliates, and most of the time I see them you need 'prior permission' and I haven't done that before but I'd assume they'd have to take a peek at your landing page. Go to campaigns, choose "by other criteria" lead campaigns, then category "email submits". There's one there now that I found and no zips currently. Check back often as the markets for these run fast and hard.