So, at what point does this become a problem for Amazon (for example)? They _seem_ to not care.
We'd really like to align the incentives of the reviewers with potential buyers. One way to achieve that would be to pay reviewers as judged by the people who buy the product from the service. There are a few problems here, like there not being much incentive to review low volume products, or manufacturers introducing 10k variations that differ by a single letter in a GUID (monitors/tvs), or a change in the quality of the product itself. These sound tractableish.
Outstanding questions: does the math add up such that the incentive of maintaining a high quality platform is larger than the incentive for manufacturers to defect (signal high quality and cheat). Can we pass on that win to reviewers?
Other thoughts: we can't punish manufacturers for cheating because its too easy for their competitors to abuse.