If you bid in the last second you can snipe bidders who didn't bid.. But of course, this is stupid if an early bid is placed because it just makes more effort to try and squeeze a bid in the last second even when any bid at any time would have qualified the player

As what @cracicot said... People who bid multiple rounds probably don't know what they're doing, they think it's ebay where the highest bidder at the time of ending, wins the auction... Someone take these players to Room 101, they need coaching on how to play this game right lol