Regarding the dyeing, players can earn way more money with other crafting than they can with those dyes and it costs them $0. All above board and legal. I haven't seen any calls for it on Siren, and I'm betting it's not the profit center you think it is (again, there are way more lucrative and efficient ways to earn the gil needed to buy a run). I'll grant you that it's possible to earn gil using real money. it's just a tremendously inefficient way to do it.
Edit: Actually, I'd love to see them bundle the dye selling with the bracelet selling as a reportable offense. That would be the fastest way to close that loophole.