You know most grocery stores offered a delivery service years before SV decided to turn it into a business model. It was a mostly unadvertised service that grocery stores ran (and likely still do run) mostly for the benefit of 'shut ins', people with disabilities or ailments that prevented them from leaving their homes.

The way it worked was pretty simple; you'd call in your order, or sometimes use the store's website or email, and the store would have one of their baggers/etc collect the requested food from the shelves and drive it out to your home. It was a free service paid for by the store, although I believe there was an expectation to tip whichever employee was using their personal car to actually make the delivery. To reiterate, the service was intended for people who couldn't go to the store themselves, not for yuppies.