>>56317940Swiss constrains player count more than winner's/loser's. A W/L tournament eliminates players so after round two half the players (and half the games) need to be played. Swiss, everyone is there all day.
512 person, 10 round bracket:
256 games x 10 round = 2560 games total
512 W/L bracket
Round 1: 256 games
Round 2: 128 winners bracket games, 128 losers bracket games
Round 3: 64, 64
Round 4: 32, 32
Round 5: 16, 16
Round 6: 8, 8
Round 7: 4, 4
Round 8: 2, 2
Round 9: 1, 1
Round 10: Finals
767 games, or 768 if there's a bracket reset in the finals.
The reason they do swiss is because there is no worse feeling than driving nine hours to go to a tournament and getting eliminated early. They want you to get your money's worth for entering. Even if you go 0-9 day one, you at least get a full day of playing Pokemon in a swiss tournament.