Many 3rd party sellers rely on Amazon for their business. It also makes up a large percentage of Amazon's profits.
The same with Google. How many people use Adsense, Adwords, Analytics for their business? If you want any sort of tech business these days, it's hard to avoid.
The same with Google. How many people use Adsense, Adwords, Analytics for their business? If you want any sort of tech business these days, it's hard to avoid.