Yes . . . I did an affiliate gig with several e-cig companies. Greensmoke, Blucigs, Instead, Lucia, but I came to realize that you need to invest some bucks and buy e-cigs wholesale so that you have stock on hand.
Doing the affiliate thing means that when your customers want refills, batteries, etc. they have to wait . . . and in this world, no one wants to wait. Everyone wants it NOW. So you end up with people who drop out and seek outlets where they can get supplies and accessories on the spot. So basically, being an affiliate for e-cigs didn't work for me. Maybe some people have done well with it but I personally think you will have more success going the wholesale route.
Cheers! - "Wiz"