At the same time, the spike in demand for food and grocery delivery for a nation stuck at home has caused Amazon to limit access to its grocery program - done through its Whole Foods chain - to an invite-only service, while supermarkets remain overwhelmed by the sudden demand for home delivery.

For those buying food cooked by restaurants, the companies named in the lawsuit have become the most common delivery method, and they are not doing right by restaurants, staff of delivery drivers, the lawsuit claims.