"Once a link is vested, it will never be deleted unless we receive a legitimate legal order to take it down." That seems odd to me. Could they simply publish

"Once a link is vested, it will never be deleted unless we receive a legitimate legal order to take it down." That seems odd to me. Could they simply publish their mappings periodically to avoid being able to fully comply with takedowns? I mean, the article using the link is already published, what legitimate reason could there ever be to destroy a link in it? What would these people issuing the hypothetical takedown do if the author of the paper had just included the link itself?