Comment by bregma

When I worked at a Linux distro I worked with one device maker who told me in confidence that 90% of their revenue came from Linux-based shops and they only needed a one-person support team. They had a 20 person support team for the remaining 10% of revenue coming from Windows-based shops.

Where I work now the top 10 customers are Linux shops. They probably account for 80% of our revenue. The remaining hundreds of customers are more evenly split between Linux and Windows.

So I guess it depends very much on what industry you're in. For consumer games it might be Windows, but outside of financials and administrative realms and into the world of embedded it's a heckuva lot of Linux. Support costs tend to be lower, and you really only have to target Red Hat and Ubuntu.