This app is awesome, as are a couple of other regex apps. I noticed that they offer commercial licenses as well. Would the people behind this site be willing to

This app is awesome, as are a couple of other regex apps. I noticed that they offer commercial licenses as well. Would the people behind this site be willing to share any paid subscription numbers? Not necessarily raw figures, even free vs paid proportions will be interesting. I'm intensely curious about paid memberships for web apps such as these. On one hand, they are absolutely awesome. On the other hand, I'm too much of a programmer to see how this generates revenue. I have an app which also serves as a tool for a small niche (much smaller than debuggex). A bunch of people use my tool daily but I've always assumed that if I created a 'premium' version, I won't make more than $5-$10 :)