Red Roo started this by mentioning the companion fares in the OP, but it still feels OT.
A meal is sold on a plate basis, if two or 10 people share the plate, same price. Do you feel aggrieved when restaurants offer 2-4-1 deals? A hotel room is sold on a room basis. (Legal or otherwise) if you can cram 5 people in there it's a single price (if you don't tell the hotel.) A rental car similar time based, a train ticket is per head, ... A theatre seat...etc.
An airline seat (ignoring infant in lap) is sold on a seat basis - two people occupy double the real estate and get two meals (both get lounge access if purchasing J, etc). I get where singles are coming from.
So I am offering my service as a companion to any single AFFer flying J or F, I just need some notice, PM me