(i'm so sorry if this has already been answered) How was the scratch initiated? I know that Bro tried, and I know that Damara had the needle kind Specibus. So i thought it might have been Damara?? Also, When the scratch was initiated, Why weren't John, Jade, Dave, and Rose erased from existence like the pre-scratch trolls were? (again, I'm so sorry if this has already been answered)

John initiated the scratch using the needles and the needle kind strife specibus. The Beta kids weren’t erased from existence because they were able to escape their session before the Scratch finished. John and Jade went through a fenestrated window to the Furthest Ring and Dave and Rose traveled there in Derse’s moon.