The theory goes a little something like this -- people actually spend more money on themselves to cheer themselves up when life gets shittier. So folks, too depressed to cook, would go out and at least try to eat, drink, and be merry.
Now how this correlates to these dining services has yet to be determined.
Often times, going to McDonalds is your best option. The Government also subsidizes Big Food, so that factors. Getting 4 McDoubles for 4 dollars in 5 minutes driving through the drive thru next to your house so you can get back home to your kids and see them for the couple hours you have in between jobs versus spending 30 min to an hour buying a pound of ground beef, buns, cheese, lettuce, tomatos, the energy and utilities cost and the lost opportunity cost of the time spent cooking and cleaning when you could be working, it isn't hard to see why poor people choose the fast food.
So that barely registers compared to time and ingredients.
It's the standard option for those who fail to pay their bills on time here.
With a prepaid, you load up money and it turns off your gas/electrical once the prepaid amount is exhausted.
Water is exempt, no one can turn off the water at a residential address, no matter how long you haven't paid...
https://www.investopedia.com/terms/l/lipstick-effect.asp
And just as a somewhat tangential but related story to the phenomenon, British soldiers distributed lipstick tp the liberated but gravely ill women of the Bergen-Belsen concetration camp in WWII, it lifted their moral just enough in some cases to help save their lives.
How much money can all these companies lose before finding themselves in a dead-end? (no positive cash-flow, no more investors willing to invest, no more local market first mover advantage).
People who deliver for these companies will do it for the ones that can give them more business and larger commissions. People who order from these companies will do it from the ones with the largest selection and the lowest fees... Only Uber can pull-off the economies of scale to arbitrate those two sides without running out of money.
VC is supposed to be risky.