This is similar to a few things they've done in FFXI over the years, for example, a /shout-like function that shows up in multiple cities. They're not sure how the server will handle it so they "test" it by releasing a limited or simplified version of it first. They don't really communicate that they're doing this very well sometimes, but it's likely this is the case here. Mr. Minagawa is usually pretty good at following up on new systems and limitations so we may see one this week. Note I'm not white knight-ing; they have made some less-than-acceptable reasons in the past ("You may accidentally such and such"). I'm giving the benefit of the doubt here because I've seen what a system that the server was not prepared for can do to a game.