It just means they can pay for event entry, or specific singles as they want them, rather than anybody trying to figure out the perfect gift ahead of time
One of the first commanders that came to mind when I saw this was Rakdos, Lord of Riots
There are enough black Commanders that make incidental tokens or play in aristocrats that this card is actively going to be quite good
While you're losing a card, you're gaining card quality and a bajillion extra mana
While professional players typically enter tournaments with metagame decks they didnt invent, most casual players craft decks from scratch based on what they want to play
SHES THE UN-LIFE OF THE PARTY If youre like me, you heard Esper Wizard Commander and assumed that this would be a heavily blue deck playing a classic, spell-based control game