They didn't use it to turn a corner, to start trying to win the game, rather just used it to lock down the game a little bit more
For example, creating three Rhystic Study copies makes it almost impossible for your opponents to play the game without feeding you cards, multiple Archangel of Tithes shuts down attackers, and so on
Edgar Markov puts an incredible amount of pressure on the board early, and playing some amazing MTG cards with low-mana costs from your hand will help you flood the board before turn four
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In a regular Limited environment, focusing your picks around a gold card is exactly what you shouldnt do