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Amazon hides cheaper items with faster delivery, lawsuit alleges
(arstechnica.com)
This is a most excellent place for technology news and articles.
Most companies selling on Amazon are contractually prohibited to sell for less elsewhere, even from their own website.
This is true. I also noticed certain vendors will sometimes have their own SKU of the “same” product - they’re just a different spec. Asus and MSI laptops are one example.