I wanted to finally turn off that checkbox a few days ago and couldn't find it anywhere. The entire page it's supposed to be on didn't exist. I had no idea whet

I wanted to finally turn off that checkbox a few days ago and couldn't find it anywhere. The entire page it's supposed to be on didn't exist. I had no idea whether that meant I'm automatically opted in or out. Thing is, if they use my dropbox content, it may be more a risk for them than for me; it's mostly PDFs I bought in webshops; stuff copyrighted by other people than me. My consent isn't that relevant; they need the consent of the actual copyright holders. And they don't have that. This is the big problem with all these tech companies suddenly realise new ways to mine all that data that they happen to have access to. The data isn't theirs, and it's quite possibly not their users' either.