I'll bite: Honest reviewer says that product works fine...for the first week or month. Wait for a year before allowing them to sell? Not doable especially on millions of new products.
Maybe reviews should be limited only to certified buyers or only those should be added to stars /rank.
Who is waiting a year? Just sell right away. The professional reviewer only has a few hours per product anyhow. That's enough the tell if the product is fake or deceptive. (Or if obviously fake, the quality of the fake :))
If you want to test longevity Amazon could track warranty repair / replacement claims.
Maybe reviews should be limited only to certified buyers or only those should be added to stars /rank.