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The market page says:
"You can complete the question arcs (Chapters 1-4) at a 75% series discount until July 14, 11 pm GMT."

But the discount is only 50% on chapters 2-4, and 100% on chapter 1.
That's either 62,5% discount, or a simple 50% using another method and not knowing what ch1 would worth without the K-virus.
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