Maybe I'm just over cautious but I wouldn't have posted revenue/traffic information without his permission. Just because he was willing to tell a single customer on the phone doesn't mean he wants it posted online.
I thought about that, but I didn't think the story would be interesting without the numbers. You know anyone else who sells a million bucks in something with 50 visitors a day? The numbers do a lot to illustrate the opportunity.
If the guy gets mad at me, so be it. But if these numbers were really a secret, he shouldn't have told them to a random guy on the phone.
I also don't think there's any harm in relating what he told me - maybe he'll get someone to help him because of it.