I think there's a difference between running a website vs being a user on somebody else's site. A website must publish its registered agent address if it wants

I think there's a difference between running a website vs being a user on somebody else's site. A website must publish its registered agent address if it wants to take advantage of the DMCA system (i.e., receiving take down demands instead of lawsuits). E.g., Wikimedia receives take down demands as described at https://foundation.wikimedia.org/wiki/Category:DMCA https://foundation.wikimedia.org/wiki/Category:DMCA. I'm unclear what the difference is between how Wikimedia is set up and the situation with the Guardian and Mail. That link above doesn't seem to contain everything that Wikimedia receives on its various sites, e.g., there's also https://commons.wikimedia.org/wiki/Commons:Office_actions/DMCA_notices https://commons.wikimedia.org/wiki/Commons:Office_actions/DM...