The Crew dragon launches with a fairly large amount of fuel for its SuperDraco thrusters so that they can provide launch escape. If the launch goes OK is that fuel carried all the way to orbit and back or is it vented at some point?
If it is carried, why? Surely it could be dumped once launch escape is no longer needed (after first stage separation?) increasing usable mass to orbit? Or dumped in orbit to increase the payload that can be brought back?