Our office started looking for a service to use for collective ordering for about a dozen people: we tried grubhub, postmates and a few local services. We usually ordered from a set pool of local restaurants. When we started ordering prices went up considerably after a few orders. Some orders just got cancelled inexplicably and some just started adding a group service fee. We also had situations where we were limited to orders of a certain size so would have to split our groups to be able to order food for everyone. Our suspicion was that some places found ways to adjust to the demand and in some cases decided that the cost of doing business with us was too high due to some factors that were unknown to us. We also had a few of those services that dropped us as clients which is why we went through so many.