To become a distribution monopoly.

> Amazon, one of the biggest companies in the world, for monopolization and unfair methods of competition.

Edit: sorry for snarkyness.

FBA de-risks the transaction for Amazon and the vendor. You sell a known quantity with a known delivery window. Small businesses often struggle with this and criminals use this to their advantage.

If eBay/non-FBA is a flea market, FBA is a online mall.