[e15ctr0n]

Those people probably wanted to pay with cash. Walmart self-checkouts[0] switched to electronic payment only[1] when the national coin crisis hit in June 2020[2].

[0] https://corporate.walmart.com/newsroom/2020/06/30/new-checko...

[1] https://www.quora.com/Why-are-Walmart-self-checkout-register...

[2] https://www.frbservices.org/news/communications/063020-feder...