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.
Modern social networks and messaging networks would seem to be a strong counterexample. Any software with both network effects and intentional lock-in mechanisms, really.
And honestly, calling such products a blend of extortion and trade seems intuitively about right.
To try to get at the extortion / trade distinction a bit better:
Schelling gives us definitions of promises and threats, and also observes there are things that are a blend of the two. The blend is actually fairly common! I expect there's something analogous with extortion and trade: you can probably come up with pure examples of both, but in practice a lot of examples will be a blend. And a lot of the 'things we want to allow' will look like 'mostly trade with a dash of extortion' or 'mostly trade but both sides also seem to be doing some extortion'.
The cost of not buying is not the same thing as the cost of switching.