Just discovered the Dropbox had turned on -- without my assent -- a feature that let it use what I've stored there for AI training, which means it was being sent to "Open"AI. I had to opt out, and only did it after being alerted here on Mastodon to the fact that this was happening. (h/t @natematias)
This is a disgusting betrayal, and I'm looking for an alternative to Dropbox.