Such a gnarly and unique idea! I'm absolutely finding a way to work this into a campaign in the future!
If you don't mind though, I do got a question referring to: "Destroying the data tapes ... will immediately free the victim from the curse, though not from any effects gained."
I was wondering what parts count as the curse and what counts as an effect or if that's up to GM interpretation. My current reading of it is that it releases them from the "offer" made earlier if they took it (as well as entirely prevent future attempts to reach out if they leave Blue Box operable) but the victim is still stuck with any permanent fallouts they caught during the curse.