Ebay is not the only website that charge their sellers to have their items priority treatment. Amazon, VRBO, AirBNB, Etsy, Priceline, Hotels.com, Expedia, and others all do it. Grocery stores, Target, and Walmart all charge vendors for end cap or front of the store space.
Amazon got 12 BILLION dollars in 3 months from ad revenues. Whether you like it or use it promoted listings on eBay isn't going anywhere.
Advertising services, which along with AWS delivers fatter profits than core retail, was key to the earnings bump in the third quarter. Revenue accelerated 26%, topping $12 billion. Ad growth is primarily driven by third-party sellers and brands that pay to have their products appear higher in search results on Amazon’s website and app, CFO Brian Olsavsky said.