If this is true, even if the members don't personally post there, their online content will still be uploaded on weverse. I'm not familiar with BP content but lets just say content such as concert reruns or winter or spring special shows will be uploaded there and Blinks would have to watch there. That's the good business thing about weverse.
BP hardly posts concert videos. The Coachella videos were finally posted last year.
And I really doubt they will not post those stuff on the yt channel.
BP yt channel is very important to YG.