Earlier quoted context omitted.
You haven't even begun to enter the world of unscrupulous activity, and Amazon is mostly 'hands off' because they don't care - but other 3rd party sellers DO and they know all the tricks about how to pump alternative sellers off the page, etc. The whole thing is a worthless Alibaba ripoff now.
Do you think some other seller falsely "reported" me, claiming my copies my be counterfeit, for surely there was no way I could offer them so cheaply to beat out the next cheapest seller by, what, 50 cents?
That seems the most likely reason. I am sure there are services to automate these kind of blackhat actions.