More than half of Amazon's sales come from third-party merchants who this year started paying an average of over 50% commission on every sale, up from 35.2% in 2016, the result of it raising Fulfillment by Amazon fees every year and increasing storage fees.

While paying for Amazon's logistics and advertising services is optional, most merchants consider these, especially advertising, a necessary part of doing business. Moreover, the FTC has reportedly amassed evidence that Amazon disadvantages merchants who don't use the services by giving them lower placements.

Capitalism at its finest... I still remember when Amazon was just a humble online bookstore. How times have changed.