For me, they're both included. I have no qualms with paying for good software if I have the ability to learn how it works and customize it to my liking. What I absolutely loathe, is closed-source that is useful to me, but with obviously lazy design elements that I dont get to customize.

That is, if "source-available" means that I can adjust the code to what I want it to be. If not, then it is not what I want.