I exchanged several emails with Stuart on this very subject last season. Stuart was very receptive to the idea, but obviously the Club have to weigh up the benefits.
For clubs like Exeter, Bath, and Sarries, there is a possible negative element to giving STH holders a few free bonus tickets over the season due to the lack of spare seats.
That's not a problem for us at the Ricoh so surely more bums on seats is a good thing as long as the freebie handouts doesn't become so large as it starts to effect one off match day sales (or indeed ST sales).
I have an inkling Wasps already hand out quite a few free or subsidised tickets anyway.
As to receiving merchandise etc. This is already partly taken care of by the Buzz Points system, but like me, I wonder who actually ever bothers to redeem vouchers against points accrued?
You can use Buzz Points against purchasing a ticket but from memory I believe you are restricted to how many points you can use against a ticket purchase.