Record company and/or artist
can prevent their music
to exist or played on Spotify,
but Spotify is not to blame for this.

It can be the artist in general
or it can be a certain album
or even a track,
and some of these can even be prevented in specific countries.

You may even
not be able to find music
that was there earlier.

Why?

Why the record companies
and/or artists is doing this
is another question,
and I don't know
the right answer here,
but it may have to be
$$$$ money $$$$