And when they will go full decentralized (which I doubt, my bet is that the book is going to be centralized), how they will do with fiat gateways? They must be centralized
You're right- mechanism of fiat money circulation will be definitely centralized, I think this information with all nuances should be in white paper.
I don't see it going another way but they should have put this info in the whitepaperbecause is something must be planned from the beginning.