[mungoid]

I think a lot of people get confused about that. There are hundreds (probably more) of paid software that offers it's source code up. You can use it to learn from or make improvements if you want but must pay if you want to actually use it.

One example is I was recently messing around with Space Engineers code. Keen software gives opens it up but doesn't mean you can just download the code and get the game for free

[starbugs]

That does not comply with the official (OSI) definition of open source and is a misuse of the term. It's a pity that people get away with this and cause this kind of confusion.