One thing I noticed is that the site doesn’t have any mission statement or “about us” (that I could find). That’s an opportunity to include not just information about yourselves, but also to communicate to potential users when they’re looking for a trustworthy source on this topic. That “about us” or “our mission” page with declarative statements is what search engines will pull teaser blurbs from much of the time.
Something else that I picked up from my last SEO coaching is that you’ll be more likely to be seen if there are other places that point back to you. With ~200 people contributing to answering questions, if even half of them linked back to the site from their own blogs, channels, or sites you’re likely to see a difference in your search ranking. It’s a bonus that folks who are looking at those contributor’s pages will have the ability to come right to your space as well.