While that is an unfortunate situation, I would actually imagine Amazon's entry to this market (which they actually entered over a year ago), would be good for the restaurants. Many thought they had some diversity in the early days with Grubhub and Seamless until they merged. Now there are dozens of services overlaying to deliver for restaurants, companies like Uber Eats, Foodler, Doordash, Postmates, and many more.
Amazon here is a me-too play here, and I'd be shocked if they reached the concentration to sink a restaurant given so many incumbents.
UberEats is free too, at least if you order a minimum. (Used to be $20 where I am, now it's $30.) Even when you pay a fee, it's only $4, which beats out BiteSquad's typical $10+ fee. In a contest for who can live the longest on tiny margins, I'm betting on Amazon -- hopefully they start signing up restaurants just a little bit east from Seattle so I can use them... When UberEats hiked their minimum I was a bit miffed.
Amazon here is a me-too play here, and I'd be shocked if they reached the concentration to sink a restaurant given so many incumbents.