I am a season ticket holder and recently got the Cardless Celtics credit card. It offers 7% cash back on Celtics ticket purchases, plus 4% cash back on dining, which ends up saving me a lot of money. If you spend $1,000 a year on tickets, you would get $70 cash back.
If anyone is interested in this, PM me because I can refer you and we both get $100 cash back for the referral. I am usually online in the late evenings.
I hope this doesn’t count as spam, this card has really been useful for me as a frequent buyer of tickets and I wanted to pass the info along. Thanks all.