Enterprise (with Google Docs), and maybe Chromecast, are the two arguably profitable non-advertising products. The other product areas are surely in the red.

Google is trying to diversify, but they haven't been successful at turning a profit on non-advertising products, at least not yet.

How can you possibly know (unless you're a member of Google leadership team)?

Because they're a public company and are therefore required by the SEC to provide a certain level of disclosure about the sources of their revenue.

I understand that, but it's not what I meant. I meant is how he knew that other products such as Play store are not profitable? I don't think Google breaks down the profit reports to this level of granularity, so it might be just reported as an ad revenue/profits.