I used to have to administer Yammer. One of the worst, most pointless and most time consuming tasks I had to do.<p>At one point they "upgraded" half of the organizations we had setup, and clean forgot to upgrade the other half. Despite me repeatedly asking their support people why a variety of odd things were occurring, it took 3 months before they noticed and somewhat sheepishly told me what had happened.<p>Yammer, quite simply, is a pile of crap. They constantly changed the UI, which meant I'd have to field support calls to help end users because of their brain dead changes. I not even once got forward notice of these changes, so it was a giant pain in the arse, and often happened right when I was trying to get more important revenue generating work completed.<p>If it's getting killed off, I for one won't be shedding any tears at all.