Online games and services were first. Now there's groceries. I just learned about subway. I'm looking for a place with beef.
https://shop.subwaygrocery.com
Not only all kinds of cheap groceries but if you go in, some places are doing a double footlong for free or 5 bucks for a dozen cookies.
There's a local pizza chain called pizza 9 offering groceries now as well, but not at discount.