Jonathan Schwartz once wrote (in a blog that has now been deleted) about how they were in talks with an organization (he did not reveal the name, but no prizes for guessing) who contented they have a solid database and their developers have no need to use an open source database.
Schwartz’s team pulled up their MySQL web server logs to show loads of download requests it received from the organization’s IP range. The point is, an organization in the business of developing proprietary software cannot say they do not need or have nothing to do with open source. May not be as a strategic decision, the developers do need and use open source software and tools in their day-to-day work.