Where is yammer popular? I worked at a place that signed our corporate accounts to that service. It looked like a knock off corporate Facebook at the time. I ha

Where is yammer popular? I worked at a place that signed our corporate accounts to that service. It looked like a knock off corporate Facebook at the time. I had figured it withered and died but I’ve heard of it again multiple times recently. Though I still know of no one that actually uses it or has heard of it.