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Re:Amazon bans incentivized reviews tied to free or discount... by Alupis on Monday October 03, 2016 @06:17PM (#12631820)
> It seems to be a common tactic for companies to get a product's rating up to 4.5 stars, then replace it with a lower quality version

What you are likely seeing is not a seller "pump-n-dump" scheme.

Rather, it's more likely another seller came along and "attached" to the good listing - except they are selling a knock-off product of worse quality. Often these sellers are from overseas, but not always.

Amazon rotates the "Buy Box" (the "Add to Cart" button) winner on a "percentage-share" basis - meaning if there are 5 sellers attached to a listing, and all stats on the seller accounts are equal (volume sold, number of positive feedbacks, account history, etc...), then each seller will get 1/5th of the buy box time. When certain sellers are "stronger" than others (meaning their stats), they get a larger percentage of the buy box time. You can see this sometimes if you refresh the page several times while on a product page. The "Sold by xxxxx" may change.

So, it's likely some cheap knock-off seller has attached to a "hot" product listing, and simply based on Amazon's Buy Box system, they will get a certain percentage of sales. Unfortunately, this can ruin a perfectly good listing for the other sellers who sell the legitimate product, and is difficult to combat.

It pays to pay attention to a seller's own feedback rating. Not just how many stars on average, but more importantly the recent 30 day trend for their feedback ratings, as well as the number of total feedbacks, since it will give an idea of seller volume (most sellers average about <10% of orders leaving order feedback, and usually <1% leaving product feedback - my company has sold on Amazon for the past 7 years, and we seem to stay right in line with what other sellers expect as well).

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