Catherine Rampell from The Washington Post and Sudeep Reddy of the Wall Street Journal wrap up the week in news. But, what else did we learn this week?

Measuring monthly active users online may no longer be the end-all, be-all.

A conversation on measuring the merits of metrics.

Mark Zuckerberg says it's the benchmark for turning Facebook's products into meaningful businesses.

An ad agency displays its Instagram-chosen interns like art.

Big brands want to advertise on the social media accounts of people with large followings. How do they find them? Enter the matchmakers.

Advertisers are showing interest in social media stars with modest followings.

The photo sharing firm's effort to cut down on insta-spam elicits some negativity.

Facebook's is paying $42 for every WhatsApp subscriber.