If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.
If you have any comments about the Open Thread posts themselves or this post specifically, please post them as a reply to the [META] comment. Aside from that, this thread is as organized as you collectively wish to make it.
You don't want to incentivise people to make top-level posts, you want to incentivise them to contribute excellent content, and it doesn't matter much if it's in the top-level post or the comments.
The guy who thought the value of the product must reflect the labour that went into it was Karl Marx. He was wrong.
Well, his actual claim is that any product which sells for less than its inputs cost will not exist in the long run, which is correct, because its production does not sustain itself. But this seems to be an empirically valid description of the common impression (even among Marxists) of Marx.