See my reply to dnt404 for two examples. We have nearly an exabyte of data at Dropbox ( https://blogs.dropbox.com/tech/2016/03/magic-pocket-infrastr... ); there's lots of interesting ML things we can do with that, whether its searching, suggestions, etc.

You have an exabyte of other peoples private data that you're mining and essentially exporting to other files?

Am i misunderstanding or are you admitting to severely abusing your users trust?

See my original parent comment about not touching user data for privacy reasons :)

He says they don't use user data without explicit permission and they generate the training data using "turking," which means paying people to classify things manually.