There's an internal debate right now about whether or not it makes sense to release specific numbers, but if I have my way, there will be a post on HackerNews in the future explaining exactly how much money we're making, and how we got where we are.
For now, here are some things you might find interesting/motivational:
-My brother and I started the company about three years ago. We launched an MVP in January 2010.
-After 6 months we had about 10 paying users (at $10/user/month). After 12 we had 50, after 18 we had 200. Since then things have picked up and we're adding >100 paying users each month now. Both my mom's blog, and the SaaS business took a long time to ramp up, but both had their tipping points after about 1.5 years.
-About a year ago we hired our first employee to help out with customer service and other random things. We plan on adding four more over the next couple of years, two of whom have already started working part-time.
I hope that helps. There's nothing better than seeing thousands of people passionately using a product you created, so stick with it!