SE, you can do better than this (Regarding Spam)

[Welsper59]

There's no spam in Tonberry. Stop the buying and the spamming will stop! Or perhaps the Japanese data-center admins are more efficient!!!

That's not entirely how it works. Once the market has been established, irrelevant to what game(s) make money for RMT activity, they have a business plan. Even if literally no one bought gil (or maybe, realistically, a few people did), they'd still be around just because it likely does not cost them anything to be on the game trying to sell their wares. Maybe less of them, granted, but they're not going anywhere. Western players (as well as folks from Asian countries that find it acceptable, like China) are the primary targets for their advertising, simply because it's how the trade became much more profitable and popularized from many years ago.