If you look on Github (even Apache), there are Microsoft employees making contributions to open source projects under their own accounts or as part of the organization. Steps under Satya have made engagement with open source across the company generally much better, not just in field/evangelism roles. This is in addition to works like this and open sourcing of things like the CLR, etc.
Yeah, but you will notice none of those are GPL projects - and my point is OSS works as a business/support/development model even outside of "monetize on support model and force a level playing field with copyleft" (eg. RedHat) - for a large number of cases it makes sense/the incentives are right even with liberal licensing.
