Edit: nm. This only happened this week, and I missed the news. Just Googled it and found out.
https://www.nytimes.com/2017/04/24/technology/personal-data-...
I hate to be a Debby downer, but I'm constantly unsure if I'm happy with Google being able to read my emails, let alone a random company out of nowhere.
It's unfortunate, because there is a huge opportunity for cool things to come out of handing your email over to some company (including this app I'm sure) but the risk right now is just too great.
The subsections "Vendors and Suppliers" and "Anonymous Use and Sharing" on section V "How we share your information" are quite vague ...
>We may collect other information that cannot be readily used to identify you, such as (for example) your Email Meta Data and IP address of your computer.
You make clear earlier that you will not sell or rent personally identifiable information:
>If you do provide personally identifiable information to us, either directly or through a reseller or other business partner, we will: not sell or rent it to a third party without your permission
But it is unclear what "email meta data" means and whether or not you will rent or sell anonymized data "that cannot be readily used to identify you". Other questions might include how long you store this information.
The vague language is what bothers people. Probably having very strong language in the opposite direction (that you will NEVER sell any data, and would shut down rather than sell it) would probably win you favor.
Dude, you are being vague when trying to allay peoples' concerns about your vague statements. Not a good sign.
I doubt a ML model trained on personal correspondence can be useful and anomomized.