Citational reference to the NSFE URL of that post is available upon request.
Apparently, this is an ongoing problem in a variety of areas for Amazon, including, but not limited to, the TOO-long-standing Shipping Overcharge Adjustments paradigm (as has been reported in the NSFE, with a good deal of credible supporting evidence, by @The_Barrington_Garag, among others).
The available evidence suggests that TPTB’s embarkation on the GEI (“Global Expansion Initiative” in ‘Dogtamerese’) ain’t quite as grand an enterprise as Seattle’s panjandrums would have us believe…