I've had the same issue. I'd like to support the artists, but the music is only available as physical media or for streaming on sites I can't use or don't want to give money to.
My current plan is to support them by buying unrelated digital merch, such as voice packs. Though if too many people do this it will distort with their metrics, so it's not a great solution.
The bad news: Summoning an entire elder god is hard. They end up summoning one of the innumerable lesser horrors in the elder god's orbit.
The good news: The summoned entity is going to grant them immortality.
The bad news: The players will experience an eternity of never-ending horror and torment.
The good news: Since it's just a (relatively) lesser entity, the players actually have a slim chance of ending this curse, returning to blissful mortality.