This bidding is a win win for Princess. By three days before sailing there are no refunds from Princess. If they take a bid for a cancelled cabin they get double revenue. The passenger gets a deal (Maybe) but doesn't know the location of their new cabin. There is no down side to Princess. I did not receive an invite to bid on my Nov 10 sailing but since I'm in a full suite I didn't expect one. Because of this new system I booked a regular Mini Suite for my next cruise and think I'll get a bid invitation. I would have gone for Club Class but maybe I'll get a bargain, maybe not. Others may also book a cabin below what they usually sail in to see if a bid is put out.