With the Platinum Rank, you get access to the following; /server, /mt, [Plat] prefix, have your name be this color, /fw in lobby, 18/28 particle effects, 9/14 arrow effects, 9/14 death effects, 46/59 balloon effects, 18/28 instant music, 11/15 mounts, 11/14 emotes, 6/7 floating statuses, 36/53 pets, 10 morphs in the lobby, a unique join message, access to /nick, access to Beta gamemodes, auto sort chests and inventory, coloured signs, elytras/fly in the loby, and most importantly support the server! Keep in mind this is only part of the benefits you gain on the server.