I'm waiting until Cloak final wallet before I get more involved.  I think others are doing the same.  Right now it's a cool forum with nice incentives, but most people only care about this coin's technology and use rather than making friends or posting about random things.  Also, I'd imagine some people don't want an additional website to visit, or have IP addresses logged.

In other words, don't worry about forum activity.  Activity will grow when the community grows, which will happen if the technology is solid and devs deliver.