Fair enough, forgive my imprecision of terms. But the NAR established and enforces the MLS data and management standards among its member associations that make

Fair enough, forgive my imprecision of terms. But the NAR established and enforces the MLS data and management standards among its member associations that make aggregation and dissemination viable. I will hazard a guess that the biggest and most active MLS's are run by NAR-associated groups. https://www.nar.realtor/handbook-on-multiple-listing-policy/policies-mls-antitrust-compliance-policy https://www.nar.realtor/handbook-on-multiple-listing-policy/...