Chris - Microsoft was the first in ' 95. MS newsgroup server. Chris posted that he could read with Netscape but not MS Internet Explorer. One guy said MS won't like this. Two MS guys jumped in and said it was totally legit.
Companies are paranoid with notion of control.
Bureaucracy, mass marketing is ok if you know it all at the top. Markets learn faster than corporations. There is no legacy, no overhead, little tools, put them together. The learning curve has jumped up like a hockey stick. Both speak the same language, but there is a Berlin Wall that prevents the movement of communication outside the company.