This response is not what I expected, but I know why you cannot download a mod on Nexus and that has to do with their unique download system.
Which allow modders to gain access to the
Mod Author's forum, it is hidden to anyone else, once a mod have reached 1000 unique downloads for a mod hence for not being able to download a mod for guests.
Another thing that Nexus now have is the
donation points system, entirely optional, and I have not opt-in donation points for my mods there.
Also, if anyone wants to download my Skyrim Map Markers mod can do that on
TWC Download.