Original Message:
Huh??? (by Mike N.):
Yes, After you reserve your Marriott week, you can use it, rent it, give it away, or deposit with with any exchange company. What you can't do it get an week via exchange from II or RCI and rent it to someone else (even if the week is at your home resort).
Some people will advertise a floating week that has not yet been reserved. It is OK to do this, but you run the risk of someone asking for a week that is no longer available. I usually reserve a high demand week and advertise that specific week, but state that other weeks can be rented "based on availability".