Slack is being acquired. The person in the comments comparing this to Microsoft's acquisition of Skype rings true, vaguely being aware of Salesforce and their structure.
Good thing I wasn't particularly in on Slack. Though they have gone by the ever more heavy enterprise side since their launch, as they honestly should have, they also have lost some of the charm that they had initially. At first they weren't so business focused and those were better times; but their impact was to be found within where they landed, so best of luck to them. This is just me lamenting the death of a product that I loved but that wasn't intended for me, at least not really.
Honestly, I'm more interested whether and how Stewart Butterfield will emerge from this (as he must, in due time.)