"(ie. Ebay’s super-helpful buyer/seller quality ratings)"<p>Ebay's buyer feedback rating is absolutely <i>useless</i> now, ever since it was made impossible to give negative feedback to a buyer for any reason, including outright fraud.<p>"...Another metric a seller can use for deciding whether or not to respond to an authenticated buyer is the Buyer Dependability Rating, which works similar to Ebay’s system."<p>With no ability to leave negative ratings, making it as useless as eBay's.<p>"Buyer asks twelve questions about an item over text before low-balling and offering a third of the asking price. Buyer and seller agree to meet and the buyer just doesn’t show up. Buyer asks seller to meet in a random motel 20 miles outside city limits to complete a transaction…"<p>But nothing in the Pradl model prevents lowballer/flake "buyers" either.