The two stories I got were these:
- You can only get subscriber prices by ordering from the Compose-Your-Own URL, which doesn't allow you to pick the exact seats and doesn't allow you to vary quantities in a single pass. (That is, you compose 2 different subscriptions if you want 2 tickets to 4 shows and 1 ticket to 15.)
- You get the subscriber price through the single-ticket system as soon as you buy tickets to three or more concerts.
Facepalm. Needless to say, this isn't explicitly stated anywhere on the SFS web site. It's not obvious at all.
If you phone them, or you go to the box office, you will of course get the subscriber price when you hit three concerts, and you won't have to worry about taking the right path on the web site. But I can't possibly be the only person who'd like to be able to do this on line.