Isn't the answer to this question if you swap Amazon for any of the big 5 a sound 'yes'?

Amazon owns the commercial aspects of many people and continues to grow in that regard with the Whole Foods acquisition.

Facebook owns all social data and knows what you are sharing with your friends.

Google owns all search data and knows what you're looking for.

Ironically, Microsoft and Apple feel a little bit smaller in this scenario, but Microsoft still owns enterprise infrastructure and knows what your company wants. Apple controls all your devices and knows what you're doing with them.

Sometimes I think Uber could make this group a 'Big 6' and own all your commute data and infrastructure.