Dear Ms. [representative],
Thank you again. I have decided not to renew my subscription in any way, shape, or form. That is the best way I know to tell SF Opera how unhappy I am with the upcoming season, which has uninteresting repertory choices and (mostly) disappointing casting.
I will buy single seats or go standing room to those operas I want to see.
The money don't spend at SFO is going to Philharmonia Baroque and West Edge Opera. I will re-up at SFO when there's a season of interest.