Billions of users, and little revenue in sight: When it comes to monetizing Messenger and WhatsApp, what's Facebook (FB - Get Report) to do?

With revenue decelerating and costs going up to manage their main newsfeed, the pressure is on for Action Alerts PLUS holding Facebook to start monetizing WhatsApp and Messenger, which have 1.5 billion and 1.3 billion users, respectively. Facebook CEO Mark Zuckerberg said on a July earnings call that more than 2.5. billion people worldwide use at least one of Facebook's apps, but the company still makes the majority of its revenue from its scandal-plagued newsfeed. 

As the least-trusted big tech company according to a Reuters/Ipsos poll, Facebook walks a fine line in monetizing its messaging apps: How can it add advertisements or other services without raising privacy red flags? 

Read the latest 'The Tech Skeptic' column here.



This article was written by a staff member of TheStreet.