Dropbox deduplicates files across user accounts to minimize storage. Effectively, this means all accounts share one private key for encryption...
Edit: to be clear, I believe it is an option on enterprise accounts to use your own key.
Edit: to be clear, I believe it is an option on enterprise accounts to use your own key.
If your threat model mandates that you use end to end encryption, go for it, and choose something other than Dropbox. But saying the encryption is pointless just because the organization that manages the keys could become “evil” is hyperbole.