Spotify has followed the same model as many other companies, like Netflix They are open with data, have good API's etc until they get market dominance then they stop supporting many of those same things. They have dropped their support for Linux Clients, they closed most of their API's, and various other things It is a repeating pattern with companies that are disrupting a market
You scared me for a minute, I thought you said Spotify dropped their Linux client https://www.spotify.com/us/download/linux/
"and it is currently not a platform that we actively support."
it is a spare project from a few engineers, with no offical support from the company, if the few engineers that support it ever leave it is Dead
and it was dead for several years before the engineer got enough support to be able to do it as an unoffical project.