I don't whine about anything. I like transparent stuff.  You answer has proved that 100 OUSD can not be swapped to 100 USD. If I use OUSD-Gbyte  then  Gbyte-BTC and BTC-USD route afterword  I will get far less than $100. That is why I would rather consider this particular asset as algorithmic   asset which remains relative  "stable" within  its bounded  algorithm but not in the real life.