Turns out, at least in my area, for the grocery items you need to buy at least $25 worth to qualify for the free shipping.
I canceled prime ~8 years ago because where I am, half the stuff I wanted was considered an “add on item” that could only be shipped free if you had > $35 of other stuff, which is a complete scam because you get that without prime.
Maybe that was just for me (in a large Canadian city at the time) or maybe they don’t do that anymore?
I haven’t considered getting prime since, it would be a lot more interesting if it actually provided the shipping terms they advertise.
I checked the first five items while logged in with Amazon Prime. They all required a minimum order of either $25 or $100 to get free shipping.
I checked the lime listed and it seems to be a regular amazon prime item for me (norcal) and not the grocery you described, which we also have.
Yeah, this is misleading. You can't send a lime for $0.25. It's $3.24 minimum.