It had to happen. As the tech giants continue to grow, they start to overlap each other, simply because there are just not that many giant markets that they can pursue. In this case, it is Facebook invading Amazon’s e-commerce territory with its new “Shops” e-commerce service. It is useful to remember that a big chunk of Amazon’s revenue comes from third-party sellers. These sellers are mostly small, and they can now set up their own e-commerce on Facebook or Instagram.