Far too many well-known YouTubers that have massive audience / subscribers decided to give up and claim burnout; fair enough I said, I understand.
Then one "goodbye" video after another, they started jumping the ship and immediately I went skeptical and said to myself: either they have some inside info that something big is about to happen (thus the need to get out ASAP) or they are about to push them to their limits with new demands and have said "enough is enough; we are not going to die for them; it's time to say goodbye, it was good while it lasted".
There's no other logical explanation, to me; this is my personal opinion which makes me very skeptical, that's all.