This all makes sense if one starts from the presumption that the seller has actually done something wrong. In any other circumstance, this is actually a middle

This all makes sense if one starts from the presumption that the seller has actually done something wrong. In any other circumstance, this is actually a middleman marketplace exercising termination powers without so much as an explanation. Nobody's saying that's wrong. If you read carefully, what poster actually said was "diversity, because otherwise you are at risk of sudden shut-off." Speaking as someone who had something like this happen with their Google AdWords account a decade ago, I must be clear: observing that Amazon is competing with Nordstrom does not make it less frustrating for someone who has not done anything wrong, cannot get an explanation, and has lost a significant revenue stream. For me, the worst part of it wasn't the loss. The worst part of it was then - and remains now - being completely clueless about what actually happened. Please consider being more sympathetic. This guy just took a hard cross to the jaw, and from his viewpoint, is encouraging people in a productive and respectful way not to put all their eggs into a single basket, using his own experience as a case example.