STH for most sports do not get the value of their tickets. Even the Giants and the Jets have to run Groupon deals now and they had a 40 yr waiting list at one point. The value of the tickets only occurs where there is a demand and scarcity of the ticket. The reason Giants and Jets Season tickets were valuable because the games were locally blacked out until the mid 70s. So the only way to see home game was to actually attend. The benefits of Season tickets for Yankees fans is that you get guaranteed playoff tickets. As a Mets fan I can say there is no need to be a STH. Maybe after the Wilpons sell the story can change.
This is my opinion from having 20 yrs of being a Giants STH and my father being a 60 yr STH of the Giants. The value has plummeted since the creation of 2nd market and the new stadium. My friends were able to purchase PSL and their season tickets the yr after the last SuperBowl for the same price I did.
Before i was an NYCFC season ticket holder, I was a Jets season ticket holder. They gave me $50 per seat 300 section tickets. It was a great deal bc they knew that was the value, even though they were originally listed for $90 each back then, and created a Lower tier for us budget conscience. That was pre-2015. No clue what they go for now, but they call me every year.