The Organization for Polyamory and Ethical Non-Monogamy, also known as OPEN, is leading the charge to get Meta/Facebook to allow people to choose multiple relationships to their profile. OPEN’s promotional guide has lots of great information about how to contact Meta, what to say, and why this matters. You can find it at the link below:
A message from the Executive Director of OPEN, Brett Chamberlin:
Thank you for joining us in asking Meta to remove Facebook’s limits on love by allowing users to add multiple relationships to their profile. This campaign is being coordinated by OPEN (Organization for Polyamory and Ethical Non-monogamy), a nonprofit organization dedicated to fostering the polyam/ENM movement by advancing cultural acceptance and building political power. Contact Brett Chamberlin, Executive Director <email@example.com>.