That Prime is if one purchase frequently off of Amazon.
I will make 4-5 purchases through the year, each in the amount to allow the Free shipping option. The timing of purchase (planning) does not require expedited shipping.
Prime seems to be more for the impulse or last minute shopper.
Well, that's one way to look at it...impulse buying.
On the other hand, there are those of us that live "out in the sticks" who benefit from Prime's shipping speed and cost. And we comparison shop Amazon to other places, both online and b&m, to make our purchases.
For instance, doing a fair bit of maintenance to our '95 Volvo 940. Brakes (pads and rotors), plugs/wires, dist. cap, rotor, etc., etc.
Bought a set of Wagner Thermo-Quiet pads and two Raybestos Professional Grade rotors. Cost me $54 shipped for all that. (Caught the rotors on sale from Amazon for $9.45/ea shipped.) Couldn't match that anywhere, not at RockAuto---who's shipping costs are not exactly cheap---not Advance, not NAPA, nowhere.
Other stuff, we just weigh the cost from Amazon vs. driving 40 minutes to Anderson, SC (the closest place with "real" shopping) or further. Not everything on Amazon is the cheapest price.
Then the returns we've made to Amazon are handled very fast and the $$ is back within a few days of Amazon receiving the item. And Amazon pays for return shipping....well, as long as you pick the "right" reason for returning the item.
😉
Then the wife uses the streaming service all the time. Personally, I don't but she loves it.
Now, if you're smack dab in the middle of a big city/suburban area with tons of shopping around, sure, Amazon may not make a lot of sense. But for us, it pays for itself easily.