This only works if the user base also evangelizes. Your model wouldn't work well if they say "Use BidSketch, its free and awesome!" and then they went there and

This only works if the user base also evangelizes. Your model wouldn't work well if they say "Use BidSketch, its free and awesome!" and then they went there and it wasn't free, they wouldn't sign up for a paid account because their initial impression was they didn't need their wallet. There are free/paid products that have been around for a fistful of years that people still accidentally stumble on. Because we spend so much time on the web we think others watch whats happening all the time and catch our moves. From a marketing perspective, you have to tell the same story for 12-18 months before it becomes "common knowledge" and you need the right PR connections. You could change your App's name and logo 10 times in 6 months and no one would really notice except for your users. More simply put: most people don't know if a product is "known" or "unknown" - they simply decide if it does what they are looking for and make their decision based on that. You are not your user, something we developers tend to forget from time to time.