heres how it worked BB5 except it was a Veto Comp
8-17-04 PoV: A VERY VETO CHRISTMAS
It's Christmas in August as the HouseGuests find out that to win the Golden Power of Veto they need to grab pairs of presents with the highest number of vetoes attached to those presents.
Each HouseGuest selects a pair of gifts, opens them, and finds within each gift a number of vetoes that accompany the gift. HouseGuests can also steal one of the two gifts or select anew. This is the first round.
At the end of the first round there is a twist, where each HouseGuest can choose from a stocking. Inside the stocking is either 10 more veto points, a luxury gift, or a zero that eliminates all the veto points a player may have accumulated before.
Adria's luck holds, and she wins the Power of Veto.
http://www.cbs.com/primetime/bigbrother5/show/w07/comp01.shtml