User blog comment:Master Sima Yi/Assassinews 05-08-'14 – Assassin's Creed: Rogue announced/@comment-5174994-20141109200450/@comment-3046679-20141110000256

I'd question the claim people like TheMediaCows aren't big. I don't like their videos, but that doesn't change the fact they practically live solely off the ad revenue from their videos.

And that's about covers it - they get those games and pump out videos rapidly, because it's a rat race - whoever uploads most videos in shortest time, gets most views, because people want to know. And more views = more money from ads on those videos.