Flickr Adds NoFollow for External Websites
And though Flickr has nofollowed all external links, they still want external websites (who post Flickr photos) to link to the original photo page without using the nofollow tag (check the HTML code generated by Flickr when you want to link to some photo).
Surprisingly, the nofollow tag is not applied if the URL in the photo description points to another page on Flickr. And external links in descriptions of Flickr Sets and Photo Pools continue to pass PageRank as noted by Jeff Muendel but am sure that will change very soon.
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Amit Agarwal is a Google Developer Expert in Google Workspace and Google Apps Script. He holds an engineering degree in Computer Science (I.I.T.) and is the first professional blogger in India.