I don't think that there is need for a permission for this... thing.
File credits
Thanks to einaregilsson for this extension for solve my life, not for the nexus dev that not make a banal script that convert all the old link to the current one.
Donation Points system
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In old mod page, you can find older link not updated like skyrim.nexusmods.com/mods instead the current one nexusmods.com/skyrim/mods.
With this extension you can fix this problem without do it manually every time. The GitHub page of the extension: https://github.com/einaregilsson/Redirector After the installation of the extension for your browser, go in the settings of the extension and click on "Import" and import the JSON.