Growing the membership will require traction from early-adopters who will be looking for reasons why they should be early-adopters. It is the same as a crowdfunding campaign that is suffering from lack of exposure.
For BackerClub to be sustainable it needs to benefit backers and project creators almost equally. There also needs to be revenue for the site to operate.
First, from the project creator perspective.
Pre-launch marketing and feedback is why I would want to come to BackerClub. A large enough and experienced enough community has to be assembled for project creators to benefit more than the price they paid to get on the site. If the benefit doesn't exceed the cost then the price would need to drop or the benefits improved.
People announce their Kickstarter campaigns in advance on places like Reddit. Project creators could be offered a coupon so they can join and post a preview link to their project for feedback. There needs to be success stories of projects that did better because of BackerClub. If those stories don't happen then it will become more difficult to market the site.
Getting linked to in project updates, like the
Elegy for a Dead World example, may be one of the more effective ways to get members.
Second, from a backer perspective.
The lounge idea may work. With so few members the present chances of winning won't be as diluted as it might become in the future. It reminds me of
KickAssist back in 2012 and BackerClub could fill the hole in the ecosystem that site left behind. Assisting small campaigns could generate goodwill and the person who's ticket won gets the reward tier.
Free add-ons for pledging to featured projects may work. I look at things mainly from the video games category perspective. These add-ons would likely be digital such a download of a song from a video game's soundtrack or code to a developer's previous game.
The real reason I see many would continue to visit such a community is to see other's opinions on projects and crowdfunding-related news. BackerClub is the first attempt I've seen of potentially aggregating a large variety of backer tastes. BackerClub would be for someone who wants to talk about both Film and Food projects without having to join seperate forums.
There needs to be people inside the walled garden telling their friends outside the walls that it is a cool place. Again, there needs to be the content here for that to work.
There is the big problem of a lack of notable projects right now. Kickstarter follows an annual cycle. It is expected the lack of noteworthy projects will continue to get worse through November and December until the platform starts to get busy again around two weeks into January 2015. Even now it was a struggle to find projects worth talking about yesterday.
There is a lasting image problem from the original launch. Asking for one's Kickstarter account login details spooked many Internet savy people away. One of the best PR tips I could give is to show that BackerClub is capable of improving itself based on feedback. There are tools that do require login information to fully function because they need access to numbers not available to the public. Patterning BackerClub's verification after those tools was a mistake because it doesn't need such access. It was good to see a response to feedback and that the system was changed to the current one. The subforums based on Kickstarter's main categories was a good step.
Reddit's community is about content sharing, right now BackerClub has hundreds of backers but a lack of discussion. I would prioritize getting discussions going on BackerClub before targetting Reddit again.
An invite system may allow backers to privately bring their friends onto the forum. The minimum number of projects backed is a way to try to promote quality of members, but quantity may be what BackerClub needs right now. You may also want to implement invites for members of the press once there is enough content to keep them interested.
In summary, it is the same as a Kickstarter campaign. There needs to be content first then exposure happens. There needs to be incentives for all parties to participate. Right now it seems like the focus should be on getting the forum to the stage where there are always discussions happening.