I once worked at AOL (2010-2012). I remember that we were told that we couldn't use AIM for work purposes, and instead were using Yammer and HipChat. It boggle

I once worked at AOL (2010-2012). I remember that we were told that we couldn't use AIM for work purposes, and instead were using Yammer and HipChat. It boggles the mind how a company with a chat product ends up using 2 competing products instead of its own offering.