The target audiences are likely to be fans of Kizuna AI. People who have followed her content as a virtual YouTuber would be interested in this visual novel to further explore her world.
The 'kizuna ai visual novel' likely focuses on the story and world related to Kizuna AI. It might involve various adventures, relationships, and growth of the character within a visual novel format.
It's hard to say for sure. Sometimes it's difficult to keep track of whether it's on hiatus or not. You could look for announcements from the creators or in relevant comic forums.
The One Piece manga has gone on hiatus in the past. This could be for various reasons like ensuring the quality of the story or taking a break to recharge creativity.