The reward for 100 Exalted reputations was terrible, so Blizzard changed it
Reputation in review: Pandaria | Engadget
Mounts - Mists of Pandaria - MMO-Champion
Mounts - Mists of Pandaria - MMO-Champion
Mists of Pandaria: Mounts, Pets, and More — World of Warcraft — Blizzard News
Battle for Azeroth reputation mounts have been added: Horde get 3 completely new mount models, Alliance get recolors of a 6 year old gryphon and horses : r/wow
Mount - Wowpedia - Your wiki guide to the World of Warcraft