On my Linux Mint 20 Cinnamon I just installed Spotify like this:
curl -sS https://download.spotify.com/debian/pubkey_0D811D58.gpg | sudo apt-key add -
echo "deb http://repository.spotify.com stable non-free" | sudo tee /etc/apt/sources.list.d/spotify.list
which is the most universal installation procedure as per their page.
I was however disappointed by the scaling on my extra high DPI laptop UHD display.
So, the question is, since this application does not auto-scale, how do I force it to a certain scale ratio?