Fallen Brothers Comics Purchase Timeline?

Hey all, maybe I missed it I know that they've been on sale for a little while, but has bitbot said anything about how long they'll be available to prepurchase? I have the money but was hoping to save a little of the money I have for other things and order them in a few more weeks. But I don't want to miss out. I already missed out on the Melchiah comic because I already bought the Soul Reaver games digitally and didn't want to double dip. I already have the Zephon one from the Dead Shall Rise Kickstarter.