My use case is that I sometimes like to use my subscription music on an offline MP3 player. So I keep my YTM subscription and am using https://github.com/ryanprop/ytm-dumper to download its files and put them on my MP3 player.

This might work for your use case too, though if you're just using it to grab content, the artists won't get royalties..., then again that seems to be the same for Linux ISO sites.