They were seeking volunteers at SJD (Cabo) on Friday afternoon (Jan. 5) for SJD-SFO. I (and my traveling companion) also had SFO-YVR. The agent got approval from his supervisor, and we were on the list as volunteers. ($500 voucher + hotel) But it turned out, that although at least 4 people had volunteered, none were needed, and I am fairly certain the flight went out with at least one empty seat.