National Subscription Program tracking/business rules

For theaters who are participating in the National Subscription Program:


1) Are you tracking this participants in any particular way in Tess? 
2) Are there any particular business rules you have put into place to prevent abuse of the discount code? Our members are limited to one discount ticket per show, but theoretically with this program they could get extra discount tickets.
3)I'd also be curious about how people are messaging this out to their subscribers/members.