Make it a singleton item and you're set. I don't think it'd work as a Live Event reward because none of the org heads use the item, and so it wouldn't make sense to hand it out.
Just put them on the prop vendors for a high price (50-100 million for a re-usable item with a 5-10 minute cooldown). Or have a shifty NPC somewhere sell 'em. Either way, as long as they're singletons with a fiarly high cooldown, they can't cause too much trouble. Hell, Rarebit set off about 20+ in a row in the same location on Recursion before without impacting server performance.