His ROI goes beyond just pitching and hitting stats. His profile elevates the team's visibility worldwide.
I can just talk on a very small level of metrics for the @AngelsWin Twitter (@Chuckster70 can probably confirm the same for the website) but the amount of followers and interaction on the AW Twitter from people outside the US has exploded exponentially since the Angels signed Ohtani. There are legit die hard Angels fans now in Japan, Brazil, the UK, Europe, and the demographics show that Ohtani is a legit worldwide draw for everything Angels (Including this very website)