True - I have read in a lot of places that $20/month seems to be the 'magic number' for a sustainable web app. Because this one is so simple, and really has be

True - I have read in a lot of places that $20/month seems to be the 'magic number' for a sustainable web app. Because this one is so simple, and really has been set up as a test case for future (larger) web apps, I was happy to just get to the stage where I could have a few hundred paying users @ $5/mth. That would easily pay the back end hosting bills and give me some spare cash to experiment with different forms of online marketing.