Lets say on a digital product/offer I am selling I create an artificial scarcity by saying, let's say only 100 available. I'd have a clear way of showing ONLY 10 left! etc. as people are actually buying it. BUT here is the twist once that number is reached I allow the potential buyer to "make 10 more copies available for yourself and friends" just by hitting the facebook Like button for this offer.
This would them post to their wall and their friends would see it, becoming potential customers. They get their product, I get more potential customers, and everyone is happy. There is of course no scarcity to the digital product so this promotion could be run indefinelty with people advertising for me for free by hitting the like button when it has "run out."
What do you think of this? Would it just confuse potential buyers? Would they be turned off by such a thing?