I think you're missing the parent's point, that you can use a /31 without separate network (not gateway) and broadcast addresses. Putting multiple customers on

I think you're missing the parent's point, that you can use a /31 without separate network (not gateway) and broadcast addresses. Putting multiple customers on the same /24 introduces all kinds of issues. Either you leave it open leaving IP's vulnerable to hijacking, or you have to create static ARP and/or MAC entries, and deal with all the hassle of managing that. Presumably, you're describing consumer service where they don't really have to care about your security unlike a business/enterprise level service.