So called “proprietary” software at least believes in “buying love”. They won’t show you the source but for a price, you can at least use their work without many questions asked.
OSS is different. If you use the wrong license, you must be a moron (proof: You’re using a different license than me. QED) Nobody wants to share their hard work with morons!
Especially not since the process to select the “perfect” OSS license is so painful. You need to read legalese, try to understand it, reason with the nice smiling person on the other side of the padded wall (a.k.a “outside”) that you’re not insane – the rest of the world is and you can prove it.
Ever tried to get some OSS project to share their code under second license? It’s a lot of fun – unless you’re serious. Then … it’s not so much fun.
Why I’m ranting?
I spend a lot of time on stackoverflow. It’s cool. It’s full of source.
But can you use any piece of that source code in your OSS project?
Are you sure?
You are. Splendid. Do you really think a lawyer would see this the same way?