Would it make a difference if we were talking about articles on a news website? I'm kind of on the fence on this one but I can see the point of view that just posting something online doesn't necessarily grant the end user an unlimited license to use the data. Source code is another example; open-sourcing a project doesn't automatically give someone else the right to use that code in their own projects.

Does Bluesky explicitly state the license the user will be publishing under (Creative Commons or whatever), or allow them to choose one?

> Would it make a difference if we were talking about articles on a news website.

News articles are pretty explicitly copyrighted and published for a commercial purpose. The websites make their terms clear when you visit. I don't think anyone can argue that it is legal to copy and distribute these articles, same as a book or movie or song.

Data posted on Bluesky on the other hand is meant to be broadly shared using the AT protocol. It is quite literally a feature. If you create your own Bluesky client, for example, you aren't committing copyright violation by downloading someone else's posts on there. Similarly, you aren't going against any terms of service by consuming a firehose of data from an AT relay.