I don’t see it, stores like KR and ACI offer a membership $9 a month plus you get free items and rewards.
Did the pharmacy thing not work out? Food delivery could be huge because other players don't seem to be taking off. Shopkart? NYC has a big outfit but their numbers are not good.. what is there name?
Of course price is a problem AMZN is not cheap. try ordering a case of Iceland water. Fresh Direct<--- that is the big player in NY