However many people you asked to give you feedback on your site before you launched it, it wasn't enough. For one, very, very basic reason: You don't have a working, live example of what the showcase will look like after I sign up and spend time putting content in it. You're asking for people to put in effort before showing them why. That's Startups 101 stuff.
Thanks a lot for the feedback--we'll change the rather lame screenshot at the bottom into something that does a better job of showing off the different showcase templates as a quick fix.
I'm looking at restructuring the homepage to tell more of a story, so I'll try and do a better job of showing how the outputs justify the effort as part of that.
Just stick a big "Here's what you could build!" link on the homepage that links to your showcase page (assuming that you use your own product). Your story should be the best selling tool you have given the fact you're selling a tool that showcases stories about people.
Plus, why not build some showcases for people who would inspire others to sign up - Mark Zuckerberg, Jennifer Lawrence, Justin Beiber, Elon Musk, Abraham Lincoln, pg, etc (legal issues not withstanding).