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.
In addition, ordering online from Walmart is every bit as bad as Amazon with the heaps and heaps of low quality Chinese junk sold under brand names that only exist for a few weeks at a time.