The most successful franchise has a STH waitlist and accounts for over 35% of total attendance for the league. They could hold off on season tickets until the day before the season and would be perfectly fine. Bogus comparison. All the other teams needs to "strike while the iron is hot", as it were. If they wait too late, they won't have the momentum of the season helping them sell season tickets. If your fans are interested now and are likely to lose interest over a relatively long offseason compared to other leagues/sports, you need to sell now and get people on those mailing lists so they stay connected during the offseason.