Question: When you clear one segment, but not the others, do you hold onto the SWU? How does it work? What if you're wait-listed for the next segment. Isn't it unfair for them to collect it at the outset?

Do you have to clear all segments at initial ticketing? Obviously this could lead to some abuse by keeping the SWU while getting an initial upgrade, but OTOH, it's not fair to collect it when you may need it later.