This is one of the limitations platforms have, it simply can't be fixed, and platforms often don't have incentives to fix it. What's important for platforms? G

This is one of the limitations platforms have, it simply can't be fixed, and platforms often don't have incentives to fix it. What's important for platforms? GMV. Faking reviews is just the first step of gaming the platforms, next vendors will pay people to fake-buying, as what's happening on JD and Alibaba on an industrial scale. They already need the GMV and commissions generated, now that PinDuoDuo is popular for selling dirt-cheap things, they need to retain vendors now too, so they don't even pretend to punish these fakings. Alibaba's 11.11 shopping festival is a good example, it goes out of its way to make the GMV of that single day as big as possible, tactics including forbidding buyers to pay before that day(make them to delay weeks' purchase to that day), disabling refunding on 11.11, sales tagets for vendors.