I too found this forum searching around on a couple questions about the XV when I was thinking about buying one. Despite the small size it seemed well organized and the people seemed to genuinely be interested in helping each other and answering questions to the best of their ability. Seems like a solid tight knit group!
So far I think it's been great. Obviously there are only so many XV owners out there currently but I imagine that this forum will grow. Current members will recommend it to new members and so on. I think some PR wouldn't hurt, stickers or plate frames or something to that effect.
Another small forum I was a part of a few years ago did a very fun and friendly competition to see who could get the most legit referrals for a small prize at the end for the user with the most referrals. Obviously there's some level of honor system involved but overall it seemed to bring a few more people to the forum with good intentions.
I'm sure this forum will grow as the XV following grows