If a rational bidder was to use this system, they would specify the most they were willing to pay in the first round. Then, in the second round they wouldn't offer a penny more (so, there is no point in the second round). If you offered less than you were really willing to pay (in the first round), then you would risk losing the name to others. The first round seems like a big money making move for Pool (however, some people might get lucky and win some great names that others didn't bid on because they were scared to waste their time). The second round helps make even more money off of unrational bidders.