Very intriguing issue possible RMT related

[Youkulm]

It's not RMT, it's airships, you can have 4 airships for each fc house you hold, so people buy out cheap fc houses and make alts to hold them to have access to more airships.

Alimdia sounds 100% correct. They just have those FCs and Houses for the extra airships. They're an excellent source of money for very little effort. A little selfish of them seeing as how limited FC housing is but SE doesn't exactly seem to care if we own 1 or 25 houses on a single account.

Please keep in mind its not hard to get 18mil if you're a crafter. 18mil, sadly, is chump change now that our economy keeps inflating ( we have no gil sinks aside from housing )

78mil for airships isn't a bad deal sseing as you can make on average 500k-1mil everytime they come back if you're lucky. ( Airship Exclusive crafting mats, grade V materia )

EDIT: The Piassa Skin? They probably put it up on the MB to easily trade it their other character since we cannot mail our alts. It was an increadibly risky move to do this as someone could snag it before you logged back on, but its their chance to take. I've done stuff like this to trade with my alts.