Well, to counter and support some points others have already mentioned:
1. Even if you join TA, you can only send in messages
to ayu. It is a one-way flow, there is no question and direct reply process that goes on at Twitter. That's why when ayu opened a Twitter account, it's a new experience for TA members too. It's also their first time being able to really "talk" to ayu. So why are some people griping about why ayu keeps tweeting in Japanese? Because she's finally able to reply to her fans (both Japanese and international alike), that's why.
2. If she starts posting stuff for free on Twitter for the entire world to see, what's the point of her blog anymore? Yes, I know it's only 5 word status-es and random photos, but if she could update so quickly and efficiently like this, why would she need to sit down and write a whole long blog entry? An example: the first couple of days ayu got Twitter, she was tweeting non-stop, being totally active. And in those few days, not a peep over at her TA diary. Of course her TA fans (including myself) will wonder whether she has found a better way to communicate and TA won't be as important for her anymore, that's probably why they asked. While there's no proof of them being nice and civil about asking, there's also no proof of them complaining/causing a huge ruckus to make ayu feel guilty. So maybe we shouldn't jump to conclusions about these Japanese fans.
I'm an international fan myself, who's lucky enough to be staying in Japan for awhile, and even I feel bad at some of the things some members are saying about Japanese fans. Can't we just get along? Imagine how ayu would feel if she knew that her Japanese and international fans were fighting over her? How bad she would feel!
