I found a site online that sells .ORG domain names, but it isn on PIRs list of authorized registrars. Why not?
Some registrars that have been accredited by the Internet Corporation for Assigned Names and Numbers (ICANN) have “resellers”. The registrar provides its resellers with the tools, such as back-end systems and customer service, required to register domain names. Using its registrar’s systems, the reseller then has the ability to sell domain names to whomever it wishes, such as the general public. This is an extra link in the distribution chain.