Isn't it $2/month per extra retainer through the Mog Shop? You'd be spending less money just grabbing two retainers that way, unless you really prefer another saddlebag over a retainer (or unless you've already maxed out on retainers, in which case you probably don't need a whole other one and a saddlebag anyway?). Either way, while I haven't downloaded the app yet it sounds to be pretty lackluster. At least you don't need it to play the game, so... ¯\_(ツ)_/¯