Of course I'd pay.
Downvoted for the obnoxiousness of saying "of course" and not giving even the vaguest of explanations. This comment read to me like this: "It's stupid that you would even ask such a question, and I can't be bothered to say why it's stupid, but I can be bothered to proclaim my superior intelligence".
This problem is roughly isomorphic to the branch of Transparent Newcomb (version 1, version 2) where box B is empty, but it's simpler.
Here's a diagram: