Comment by gregdoesit

We did acquire GroupMe with the same thinking: take that startup with a good group messaging product and integrate them into Skype.

Except this never happened, GroupMe is still a standalone app and pretty much a standalone team. I am not sure why we didn't or could't integrate them, the Microsoft aquisition of Skype, and the subsequent integrating with Lync (and the birth of Skype for Business) probably had higher priority.