Customers are always free to leave. Nobody is forcing someone to pay for spotify so your argument is absurd on its face.
Customers also are free to tell Spotify they aren't happy with the service before they leave. And then its Spotify's choice to either make their current customers happy, or try to welcome new ones to replace their cash.
There is no expectation or obligation of free speech on a private platform. Censorship arguments ring hollow when outright lies are weaponized and causing measurable, real harm.
I’m not going to bite on the ivermectin/ventilator stuff because it’s just completely absurd. BTW the way you used the “it’s easy to argue” construction backwards.
If your desire is to ignore the facts and instead yell into the void a position without substantiation (“no deplatforming! carry All The Speach Regardless of Content!), that sounds unlikely to persuade. I mean, you know they moderate this place too? Simply turn on “showdead” in your profile to see the deplatformed.
You have to jump through an extra hoop to see them at all, and you can't interact with them.