You might have done this with good intentions in mind, but I don't think this is a good idea. A pyramid scheme is NOT something positive. Only less than half the people that get informed about some product will actually have access to it if this method is used to pass the word. That's not a good strategy, and will push reasonable people off. You know, those who understand pyramid schemes. If I get informed about something that tells me that I have to share it with three more people (or accomplish any kind of assignment for that matter) in order to actually access it, I will immediately press ctrl+w and forever forget about it.