More or less. It's hedonism with the addition of appeasement rituals. The basic worldview is that life sucks, get what pleasure you can in this life, and that you pray to Satan more to appease him and ward off misfortune than anything (although you certainly *can* ask him to smite thine enemies, but at your own risk).
In that respect, it's unoriginal as an inversion of Christianity, and it's also unoriginal as propitiation of a negative spirit is as old as civilization itself. You didn't offer sacrifices to the old gods because you loved them and wanted to thank them, you did it because they were right bastards and you wanted to keep their attentions pointed elsewhere. It's like a divine protection racket.
Well, that sorta makes sense. Although Self-centered Hedonism and rituals seem contradictory. It seems that you'd think your own self is fully responsible for your success or misfortune and of course, there is absolutely no one else more important then one's self. So why go through the effort of offering sacrifices to give deference to anything else, supernatural or not?
Or is the idea that, in practicing such hedonism, or reguardless of it, you become an ally of sorts with some powerful entity and it's just your own self-interest to persue such an advantage? Having friends in high (or low) places and all that?
Although, I'm pretty sure the whole thing is really just a protest or rebellion aimed at offending Christians, which is fine as a rationale, if not somewhat juvenile.