Business Model Users News Today

>> his performance in front of congress was poised. he had the right answers. i think he did laps around the people there. >> reporter: but part of that success was due to the facts many of the questions asked by the senators demonstrated a lack of understanding about how facebook and tech in general works. >> if im e-mailing with an whats app, does that ever inform your advertisers? >> how do you sustain a business model users dont pay for your service? >> senator, we run ads. >> i see. >> it w...