There is an adage that is quite appropriate for this, which was said to a newbie at a BDSM club a few years back. "If all of those who are complaining that there's not much play going on stopped complaining and started playing, there'd be a lot of play going on."
Best thing to do is start a thread that leaves others wanting to contribute. It works better if you include a little of your experience in the topic, even if it's nil. "Do you like ABC?" as a rule are uninteresting, because responses tend to be yes no yes. If you start off with "I had this wild dream last night, and wow!!! So, has anybody done this for real? What was it like? How did you get into that position in the first place? Would you do it again? What advice would you give? What would you change?"...
Asking a personal question alone can be invasive, even on a board such as this one where most are open, so volunteering something about yourself always helps invite others in.
Also bear in mind this is still a fledgling board, geared toward a particular subgroup of getdare originally, so there will be a slow period while the community builds.
Mike