I would like to say that, if the game does become comm-based and players support this hybrid system, this form of posting would be completely optional based on player preference.

Players who prefer to post only in the community with all posts and comments present in the community would certainly be allowed.

Players who prefer to post a copy of a post with a link to a personal journal would also be allowed.

This system would be optional, though at least a copy of a post (with a link to the journal accepting comments) would be required in the community.