Like, just the business ramifications I find fascinating. I'm personally not interested in Ninja, Fortnite and I'm not really an avid Twitch viewer, but it's interesting what they felt he was "worth." By basically every metric, Ninja's star was fading. He's nowhere near the highs of a year or so a go and he's now definitively not a "championship" caliber player. Don't get me wrong, he still has a large following, but he's basically the "face" of streaming even if his #'s don't back that up anymore. Considering how rapid things can change in this career and the sheer amount of competition he has, it's an interesting bet that they think he'll still be "huge" in the future or if they think all the advertising they got just from his move was worth it.
Only entity I for sure think this makes sense for his Ninja. He's still big for sure, but I think the writing was on the wall for him being a basically one-game streamer that is likely is past his peak for interest. Mixer shelling out obscene amounts of cash for a star past his peak kind of reminds me of sports free agent signings where a small market team will sometimes massively overpay just to get a "star" on their team. His #'s will certainly go down, but his month-to-month grind will be no where near as important if he already got the huge payday up front. Plus, you can be sure Microsoft will have him as the "face" of Gears marketing and eventually Halo. It's just a question if the masses will still think he is "cool" or "care" about him or if they have moved on. But like I said, he got his $ and likely can transition to a less hellish schedule and not just play Fortnite all day every day.