Amazon gives non-Prime members free shipping at $35 or more of eligible items. Instead of simply letting users get the product with free shipping, they’ve added a discount that prices it exactly one cent below the $35 limit, while only subsidizing the price with $3.38, which is about half of what they’ll then charge you for shipping.
Walmart and Target already do it. Just get rid of the public facing store part and send it to me as cheap as retail.
There are companies in china already doing this.