3 users doesn't sound like a lot -- and it's not -- but everything has to start somewhere! Looks like most users come from Twitter where I have a few followers. I also created a screencast to show a little "build in public" although I'm not sure how helpful that will be.
The hope is to provide a tiny bit of virality with public collections that users can share with a CTA at the bottom for non-logged in visitors. I also have a few other ideas for SEO, but I want to provide a little more in the MVP before focusing on that (says every developer ever).