Interesting question, chbuff! I don't really think that ticket prices have any effect at all on the number of STHs. You may in fact be up against the supposed cap on STHs for your division. I'm not certain what that figure might be for Div IV teams, but I'm pretty sure that there is a soft cap for all divisions. My team has made the playoffs for 12 straight seasons, including the last 8 in II.4 (USA) and the number of STHs has not varied much—and dropped at least once— n the past 4-5 seasons.
Pappy