"Amazon does not accept product reviews based on anything except the product" would be a more accurate title. There is another way to review sellers - perhaps this would be a better place for reviewing a seller.
Hm, they may be rule lawyering, then... preferring certain sellers over others, and applying the rules in an inconsistent way to benefit favorites while squishing people they have something else against. All this is speculation on my part, of course, but wouldn't surprise me if accurate.
TIL Amazon comment regulation is apparently run by reddit mods.
