Censorship (let's be clear about the type of censorship that could have happened here: a private company may have stopped carrying a program that its users don't like) of dangerous speech (hate speech, extreme misinformation) is VERY much different from censoring music that has "salacious beats".
In this case - Joe Rogan (and, hence, Spotify) amplified the idea that the pandemic is not real. That is _dangerous_. That will (and is) lead to thousands of deaths due to ignoring health guidelines. People subscribing to Spotify have the right to be angry about that and end their subscriptions. Spotify has the right to decide that it's in their best interest to end carrying that kind of message. This is simply free market forces (which I thought Republicans liked?) at work.
I, myself, was a long-term Spotify subscriber. I canceled my membership over this. Do I actually think it will make any difference to Spotify? No - probably not... but at least I am not giving dollars to an organization that is actively promoting dangerous speech. That's my right.