You get the all-important elf type and potential card draw
There are lots of situations where you draw it and don't want to use it at first, perhaps you have lots of lands or only very low costing cards, the Chrome Mox will sit in your hand but instead of being dead it will be a get out of jail free card
Brie-stro didn't specify if this deck is better at going first or second at the start of the duel
Fortunately, since it is a continuous trap, if it remains on the field for the return turn, you can move depending on the cards you have drawn, but
In short, every granted effect is going to get you ahead, especially when you can untap all your Lands and cast another few spells
If you win a game while you control The Playful Winners or its your commander, put a tally mark on it