WoW's cash shop was pretty good about only releasing a things on their shop as a fairly rare occasion. If FFXIV got something like that, as in a costume/pet/mount every few months (charity sales were also super popular), there's no harm in that in my eyes. Physical merchandise paired with in-game goodies is also cool despite being at Japanese prices - they used to sell silver replicas of FF jewelry that were exorbitantly expensive... imagine them at a more reasonable price + in-game vanity model to play with? Would be fun.