OpenAI is testing or rolling out a change to how you can click to see the sources from the ChatGPT responses. It used to be a button named “Sources” in the footer of the response, but now sometimes it is showing up within the three-dot “More actions” menu, requiring you to click more to find those sources – which very few will do.
OpenAI made a number of clarification changes to its crawler help documentation to say that version number of the user-agent string may be updated and it may use a user-agent string with an additional robots.txt marker.