It's not quite clear why these food deliverers have started accepting coins as payment that have no bottom and can fall indefinitely, because they are just meme coins, without any utilitarian properties or deflationary model. In my opinion, accepting such coins as payment carries additional risks for business.
Whether we like it or not, mega popular meme coins still have value and a large userbase who might be interested in spending their shitcoins whenever prices skyrocket again, and some companies don't want to miss out on adding another revenue stream. Personally, I know some people who were holding Doge for years and as soon as their bags of memecoins started going up they went on a crazy shopping spree in stores that had implemented bitpay and coingate (another crypto payment gateway).
About the risk for businesses, yeah it's always there, but Bitpay converts to fiat currency on a daily basis so, as long as the companies understand the high volatility of the market and opt in for settlements in local currency every day, they should be good.