The premises of Pascal's wager are normally presented as abstract facts about the universe - there happens to (maybe) be a god, who happens to have set up the afterlife for the suffering of unbelievers.
But, assuming we ever manage to distinguish trade from extortion, this seems a situation of classical extortion. So if god follows a timeless decision theory - and what other kind of decision theory would it follow? - the correct answer would seem to be to reject the whole deal out of hand, even if you assume god exists.
Or, in other words, respond to a god that offers you heaven, but ignore one that threatens you with hell.
Viliam's account of a "supernatural Stalin" was in fact a strawman. It is not even equivalent to the evil God in gnosticism. The gnostics thought you were supposed to reject that God and not do what he says; you definitely would not say that he was good. In contrast, no one believes Viliam's theory, and so it was definitely a strawman.
It is also strawmanning, although less indefensibly, to imply that modern religious beliefs are equivalent to ancient extinct ones.