"Free" has unfortunately ambiguous meanings when it comes to software. The poster here isn't talking about the monetary sense; he's talking about "free" as in "

"Free" has unfortunately ambiguous meanings when it comes to software. The poster here isn't talking about the monetary sense; he's talking about "free" as in "free to do whatever you want with it". Microsoft stipulates things you can't do with the software, and it sounds like parts of the final product are even closed-source, similar to what Google does with Chrome vs Chromium. Except in that example, the distinction and the existence of the OSS version are much more clear and well-known.