After having thought more about these IOUs on the blockchain, Ive realised they are actually really important.
For Market pegged assets to work, we first need price discovery of the real BTC/BTS exchange rate to tell us where the peg should be. So we can either get that from centralized exchanges and let them have all the fees, or we can let the blockchain earn the fees as well as introducing users to our ecosystem.
Core dev team 10 steps ahead as usual.