> Meaning private data? Is this covered in the TOS?
Your question is right on the mark. The last attempted privacy policy change, less than two months ago, did cause some reactions:
"The latest update to the Privacy Policy allows some Evernote employees to exercise oversight of machine learning technologies applied to account content"
https://techcrunch.com/2016/12/14/evernotes-new-privacy-poli...
"The policy changes have to do with machine learning, which Evernote says it is using to “help you get the most out of your Evernote experience.” Evernote wants to let its machine learning algorithms crunch your data, but it doesn’t want to stop there — the company also wants to let some of its employees read your notes so it can ensure that the machine learning is functioning properly."
Also:
https://techcrunch.com/2016/12/16/evernote-u-turn/