> Just bear in mind that if they don't like how often you return or the circumstances, they will issue you a sudden lifetime ban

I think that if I had to return frequently, I'd find a different vendor well before Amazon would decide they don't want me as a customer.

On the rare occasion I want a return, I've assumed that the reason they handle it without any issue is because they can see my lifetime purchase value vs. my return rate.

Maybe they don't care about my stats I guess but whichever way I'm currently happy in that regard.

I do worry that the competition is being wiped out, but I don't believe in boycotts for idealistic antitrust reasons.