Hi there;
We have had great success limiting seats within a performance but nearly all of our offers are done on a per production basis.
Is there a way to limit at this level?
Our promos would also work on a per order level if you were limited to 2 of a certain price type for your entire order.
Is there a way to limit at this level instead?
Would this require custom?
I think this would be possible with the new pricing rules engine coming in a later release of V12. I can't think of an out-of-the-box to do that at this time though.