No, just....no
This is wrong on so many levels
The major online grocery retailers work because they have massive bricks-and-mortar shops and warehouses to provide good prices. Unless amazon plan to buy out Kwikimart or something that won't apply.
And it's another tax on Prime users. 'Free' - but useless if you don't want it/aren't eligible. I just wish they'd split Prime into its component parts - I'd happily pay a fair price for free next day delivery, but they don't offer that. Prime means that as well as the delivery I have to pay for lots of useless things I'll never want or use (Clarkson?).