His argument about of long tail item's value for sell of mass market items, is also true for any other market. Amazon uses this in a clever way. For long tail

His argument about of long tail item's value for sell of mass market items, is also true for any other market. Amazon uses this in a clever way. For long tail items , it lets merchants sell their wares at it's site , with little cost to amazon.This lets amazon control the mass market sales. But this can go further:now amazon controls the customer , and the data of the niche market sales. If amazon find a scalable way into niche market sales , it could easily disrupt all it's merchants.