675 million members is a new milestone for LinkedIn – back in November, the platform reported reaching 660 million total members, which would suggest that its added another 15 million over the last three months. Of course, ‘total members’ is not the same as ‘active users’, the more common measurement of social platform growth. There has also been some criticism that LinkedIn is becoming a little too casual, with members posting overly personal or non business-relevant updates in order to fish for engagement. It’s possible that such activity is helping to drive up on platform interaction.