No they don't really have the BS system like college football does. You're right, the ranks don't mean as much. As long as you're one of the 64
teams to have at least over .500 (I believe) you can go to the NCAA tournament. Anyway, they determine the ranks by how many games they have played,
how many wins and losses they have had as well. Also keep in mind how many points they score each game against their opponent, and how many the opponent
scores against them.
For example, you have two teams that are 15-0. If Team A is in a tougher conference than Team B, Team A will be ranked higher.