I’m super late in reading this, but what a cool concept! As much as I’ve heard you talk about SMTs before, I’ve never thought of having games having their own SMTs. I agree that this would be a GREAT incentive for good behavior in game, and also for playing consistently and playing well, for a chance to get SMTs. Yeah, this could really turn the heads of casual players and incentivize them to play more often.
You should form a committee (or whatever it needs to be) and see this one through!