It also draws you a card when it enters the battlefield, which is great at any point in the game.
It still relates to the effect of the card, but at the end of the day its a piece of writing that you could use in a completely different setting outside of Magic and itd remain equally powerful and good
If the only creatures you're running are MTG goblins, Conspicuous Snoop is a great way to do just that, letting you play goblins from on top of your library
A lot of combo and control decks will fold to hitting some specific cards even if they don't help you that much
Its less useful if you dont go wide enough, or dont have vigilance, to use the Convoke reliably
Greater Good, Lifes Legacy, and Evolutionary Leap are excellent forms of card advantage that require a sacrifice