I remember purchasing a Phyrexian Praetors: Compleat Edition Secret Lair from a local store at a $30 markup because I had missed out on the initial sale
This allows it to prolong battles and sustain itself
For context, depending on the state and contents ordered, the price of a Happy Meal in the US ranges from $4-8
It gets even better in EDH decks like Tergrid, God of Fright, where youll profit if they discard cards or sacrifice creatures
If you single sleeve your cards then that Code Red Mountain Dew that just spilled all over your expensive Commander deck has already found its way into your sleeve and is now destroying your cards
When an effect removes all abilities from a creature, turning it into a vanilla creature (like say, through Kenriths Transformation), it can still deal Commander Damage, because the card itself is considered your Commander not the creature, its name or rules text