Because Gambit achieved similar results to FaZe under AdreN's leadership after Zeus left, after the morale of the team was stomped having just won a major, and he continued to frag while doing so. AdreN may be the goat of CIS cs at the moment...I know I know, GuardiaN/s1mple/Zeus etc...AdreN has been doing it longer and more consistently than most while not being recognized the way others have been. Sure he has fallen off some since his heyday. But it makes sense to take him over Tarik. The experience and ability to fill any role at the top level while also knowing the European/CIS/asian competition is more valuable to FaZe than what Tarik can bring as the youngest member on a team of absolute legends, while trying to replace an absolute legend and learning a new style of CS against new opponents. FaZe players already respect and lookup to AdreN. It's a perfect signing considering who's available at the moment.