Because the application was successful it did receive a bit of press. I didn't actually ever directly talk about how much money I was making, or how many downloads I had, but I'm sure most could have made a decent educated guess at both based on App Store ranking and the press coverage.
Hmmm. Maybe I'm the minority, but I can't extrapolate those data points to even begin to understand the ballpark. I have an app tucked away somewhere that has a huge amount of traffic and a great rank in its marketplace. If I were to provide the stats and the context, you might assume I was making a killing, and you'd be wrong.
Ouch, bad luck! But was this after you published an article or two talking about your success, or was it cloned independently?