Yeah, since I'm a single developer, and not a company, my wife wouldn't like it if I shared the money aspect with the whole world. I thought people might be interested in the download numbers though, as how that translates into revenue is very dependent on the app.
I'd say I don't have a wife, but there's a woman who'd be mad at me for saying that ;)
Seriously, people use the wife or parents scapegoat all the time. In high school my mother told me if I was at a party and being peer-pressured into something I didn't want to do, to blame her in order to get out.
I am, for one, happy to see that people with families bootstrap businesses. I imagine that it can be tough financially and time-wise. So, naturally, significant others should be in the loop.
If you read the article, he did mention that his wife wasn't very happy that the server was taking 20-30% of the app's revenue. Then later on in the article he mentioned that he took the server cost from an average of $10 a day to just the free tier.
Based on this information I deduced that the revenue hovers around ~$1,000 a month? Not sure if this rough calculation is accurate though.