In the US, at least, they like to make it confusing. Sometimes they claim there are no fees, but of course then there is a spread between the buy and sell rates. Other times they charge a fee and there is no spread.

There is currently a question related to citing SO posts. The "rules of the game" here are that things are Creative Commons licensed. Does anyone here know who is the one giving the license? Is it the site owners, who are claiming copyright of everything written here and can, therefore grant a license? Is it the individual posters who retain copyright and just somehow agree that they grant a license. Who is the rights holder?

@Buffy Posters grant the site owners an irrevocable license according to stackoverflow.com/legal/terms-of-service/public#licensing - the particular license allows others to redistribute under the same license

So, @BryanKrause, the copyright remains with me, so that a citation of my posts should be to me, not to SO as a whole. Do I have that right? In other words, I am the licensor, of my posts, retaining other rights.

@Buffy That's getting a bit beyond what I am completely comfortable saying. It seems like under the attribution clause of CC-BY-SA you are expected to provide attribution to the original author. Content on SE can be adapted (i.e., edited) by others, though, so it gets a bit complicated. Law.SE might have something more to say, although note that licensing issues are a bit of a sore spot right now on the network, if you haven't already seen

@BryanKrause Thanks. I noticed earlier that we were working/writing in parallel here a couple of time. I was about 15 seconds behind you. But then, later, you got 15 minutes ahead so all I could do was up vote.