Paying actual quality control people - harder for some business models than others, but this has been the way it&#x27;s been done for years.<p>A department store gets goods from potentially thousands of suppliers, and yet doesn&#x27;t have to ask every customer to fill out a survey to do quality checks. Ditto your local transit agency can tell how well they&#x27;re doing without polling every rider.<p>Obviously a harder problem when you never meet your suppliers, but IMO still a tractable problem - IMO part of the problem is that leaning on customers to do quality assurance has become a default rather than a fallback. Harder upfront quality checks also plays against the desire for hypergrowth (you can only vet so many vendors so quickly, plus some of the bad-but-not-horrible vendors are actually valuable for you).<p>Side note: it&#x27;s probably more palatable for customers to give feedback if that feedback is actually acted on. One of the annoying things about, say, AirBnb ratings or Amazon ratings, is that they largely just feed into a giant pool of votes, and the only outcome of your feedback is an imperceptible nudge of some tiny fraction of a 5-star rating scale that&#x27;s visible to other users.