They are using git, so this is "I'm not pulling changes from you" instead.
Link to Original Source
I see dropbox still tries to mislead people into thinking their client is Free (and according to you, succeeds in it). Their website weasels around the subject but the truth is that only the small piece that integrates with the file manager is open source and the actual client is not.
Exactly. This is from the nautilus-dropbox Debian package available in non-free:
Installing this package will download the proprietary dropbox binary from dropbox.com.
That's far from being free software, unfortunately.