The people who love PC can be stated as waves in Naminé's opinions. When it is your time, you will be the high tide and the DCC seems to be as simple as your backyard, without much difficulty in posting anywhere and anytime. Eventually though, new people join in, and it feels that the "circle of friends" aren't as tight anymore, and people retreat to keep in contact via MSN instead. Eventually, the feeling to leave shows itself...
Naminé only gets on to check on several specific threads and the fanfiction areas herself, talking to Ms. Lily, Mr. Hitori, Mr. Krafty Quill, and of course Mr. Roy Mustang too (it seems that Mr. Rock Lee disappeared somehow ever since she invited him to have 'a cup of coffee' with him) That's how Naminé treats the PC ring~ PC can hardly be influencial enough to affect her marks though. Usually, on the weekdays, she usually post once right after school, and check once more before bed, hence why Naminé seems to post twice a day in Mr. Roy Mustang's fan club as well~
Without participating in DCC, it's fairly difficult to ever be too involved in PC as it's not overly active anywhere else.
If Mr. Roy Mustang is to leave, why he can always keep in contact with Naminé via MSN?