Online scam?

I was curious if anyone has ever used one of those sites that offers to sell e-books and after a certain number of people buy those e-books, then you get a free item.....   not MLM scam b/c you don't personally have to sell e-books... not pyramid scam b/c it doesn't increase... just curious if anyone has any experience with these.. 

Oh yea, you see these advertiesed on e-bay a lot...  the buy (in dash screen) for only $200  thing....   looks like it COULD be legitimate if the owners are honest

youre talking about a "matrix", and these are the facts.usualy how they work is that you buy in at say 20.00,  your name goes at the bottom of a list of names, each name in that list is another person who has bought in to that matrix hopeing to recieve an item, lets say a 12"w7, the matrix forumla is this, there is a set # of buy in's usually between 3 & 20 required to move up one spot in the matrix, which brings you 1 spot closer to your W7, now say the requirement to move up in your matrix is 5 buy in's and you are person # 15 that means 75 more people have to buy in to that matrix before you get your W7, now say that 5 pepole,enter that matrix a week you'll recieve your "free" product in about 15 weeks or 4 months. sounds easy right? Think about this, what if you are # 75(a more likely position) 375 more pepole have to enter the matrix for you to recieve your W7's at 5 pepole a week thats 75 weeks (or 18 months) Worth the wait you say? what happens when pepole stop buying in?