That page has some explanations including what they will be doing, "We seek to mitigate costs of shipping over time in part through achieving higher sales volum

That page has some explanations including what they will be doing, "We seek to mitigate costs of shipping over time in part through achieving higher sales volumes, optimizing placement of fulfillment centers, negotiating better terms with our suppliers, and achieving better operating efficiencies. We believe that offering low prices to our customers is fundamental to our future success, and one way we offer lower prices is through shipping offers." Those explanations do not include what you're saying.