I really didn't understand the issue.

[Bluevann]

The only thing that makes me irritated at band-selling is that in a way those people are buying gil with real money, and that way, RL-richer players can get in-game advantages over RL-poorer players. I'm poor IRL and I'm working hard to get a large house with my FC, but what if all these RL-richer players buy all the houses before we can thanks to their wedding bands exploit?

It's a form of pay-to-win, as much as gil buying.