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by SifJar
1176 days ago
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Couple of fairly simple things they could do to at least help somewhat: * Put reviews for current listing at the top of the reviews (currently default sort seems to be a vague "Top reviews", but can be changed to "most recent" which presumably accomplishes this. Vast majority never change defaults though) * Clearly mark any review that is for a previous version of the listing, and provide a link to view the listing at time of review (so can easily see if it was a completely different product or a simple typo correction etc.) * Perhaps make history of listing visible, so customers can see when and how the listing has changed |
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I hate to say it but I think some type of heuristics would be needed here.
1. Has the title significantly changed. 2. Has the price significantly changed. 3. Are the search keywords that were finding the old listing significantly different than those finding the new listing. 4. Have average ratings and common words in reviews changed? (Especially rarer words that match the new and old listing respectively)
If some of these start to look suspicious then I think you can start to apply your mitigations. You can probably even scale them by how sure you are. For example reviews are always downranked by age and significant changes to the listing amplify this effect, you can add the same weight to the start rating.
And of course the real way to prevent this is to flip the incentive. Add human review and a warning before killing the account. Make it so that the cost of being caught negates the benefit of doing this.