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.
A company taking excess revenue and reinvesting it isn’t profit.
There may be phrases with the word profit in them that include that value, but the general accepted definition is profit is the money that gets distributed to the stakeholders after expenses are covered. This is things like dividends for publicly traded companies, or for private companies, it’s just straight up paying out the cash to stakeholders.