An activated mana ability is one that adds mana as it resolves, doesn't have a target, and isn't a loyalty ability
While Number 41: Bagooska the Terribly Tired Tapir is in face-up Defense Position, all face-up monsters on the field are changed to Defense Position, with the activated effects of Defense Position monsters being negated when they are activated
In grindy Commander pods, it turns your mana base into a resource you can reuse over and over
If you play something hyper-specific like Kamigawa -block Pauper Tiny Leaders Commander, sure, youll have to brew something else
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NOTE: THIS IS FOR 1 MINI TIN, NOT 8 - PLEASE UNDERSTAND THAT YOU WILL RECEIVE 1 MINI TIN AT RANDOM