I have been using clickboarding for my team of 100s in order to keep them engaged with one another during their day at work! The ease that you can see your coworkers' activity via this platform has made it so easy when we need quick feedback from each other throughout our days together as well as having fun activities planned ahead of time.
It would be great if they added more options such as polls or surveys where users could vote up different choices without needing someone else/other person present (ie., survey questions). A lot easier than email chain emails etc.