I emailed them just in case they didn't see the above, and their response is:
We require network access in order to collect analytics on how the
keyboard is used. This information is completely user anonymous
and we only use it so we can improve the experience for our users.
We request social contact information so that the app can import the
names of your contacts into our dictionary locally on your phone.
This information does not leave your phone.
We think it is of utmost importance to respect the privacy of our
users and only request certain information to improve the user
experience. For further information about privacy, please see:
http://minuum.com/data/
Please let us know if you have anymore questions,