In the meantime, I also found skymods.ru but it only supports Cities: Skylines, Stellaris and Hearts of Iron IV.

I suppose the short-term solution would be to:

• Buy the game on Steam

• Download mods

• Paste them to your pirated game

• Leave the game running for a little under 2h so that Steam doesn't become suspicious

• Refund it

However it's kinda inconvienent and you risk Steam refusing your refunds at some point.

This website only instructs you how to download mods from Steam in the most roundabout way, through CLI. You still need to log in as an account that has the game bought in most cases :(

Some do work in general, but only for select mods, not the ones I want. Will edit the reply. Sorry for the confusion.

Out of those listed there:

ggntw

Works only for select mods for select games.

Steamworkshop.download

Didn't work.

steam-workshop-downloader. com

Didn't work.

Workshop Downloader

Didn't work.

steamworkshopdownloader. ru

Works only for select mods for select games.

steam-workshop-downloader

Didn't work.

I have yet to check the downloadable ones:

NetherWorkshopDownloader

SCMD

steamworkshopdownloader

Workshop Script