According to Downdetector, there's a large amount of services that have outages at the moment: https://downdetector.com/

The graphs for Spotify and multiple other services look very similar, so Spotify being down might just be a part of something larger. Whether it's Russian hackers or some more mundane is pure speculation at this point.

They did block RT... I wouldn't have expected any hackers to have cared too much about that, however.

It's called hybrid warfare.