Your risk of being bumped is no less, nor no greater than if you were a full revenue ticket. You are also eligible for DB compensation if you are bumped.
Because you havenot been issued with seats as yet, it is possible that you will be bumped if:
1. You get to the airport late and all of the "Airport Protected" seats have been given out.
2. There are not enough voluntary DB,s to clear down past you on the stand-by list.
My advice: get there early.