Do you have a source that these low income Americans are the ones who are ordering food? My understanding was this was largely people with additional disposable income who were doing it for convenience and not necessity as the product for the price was a good enough trade off. I find it hard to believe low income Americans are getting their groceries delivered when they can’t afford the base prices for the most part.

Walmart+ actually provides a 50% discount if you have a valid benefits card, so that's "only" $7 a month to get "free delivery" from Walmart on the regular. All sent out to their Spark Delivery low-paid gig drivers.

https://www.walmart.com/plus/assist https://www.sparkdriverapp.com/en_us.html