One vlogger think there's more to this story.
I saw some Youtube commenters reacting who was worth to share.
My Theory... Youtube can't ignore Pew Die Pie anymore. With this 100M subs, they have to aknowledge his importance on this plateforme. My guess is that Youtube asked some sort of symbolic closure on what divided Youtube and PDP to go forward with this button, a presence that cannot be skipped this year in the Youtube rewind, and to finaly release the Scare Pew Die Pie season 2 production that is still sitting on a shelves at YT. My guess is they had a talk, negociated a peace treaty and came up with this donation thing. It is CLEAR that there is something up since Pew Die Pie NEVER talks about his donations. He hates that and those who does it. It may not be a forced move but it is one that is strategic for sure. I think YT did it.