The following was emailed to me after trying to submit an app to the Dropbox gallery.
Your app currently processes the OAuth app authorization flow inside a web view, instead of the system browser. In order to support the Google Sign In flow when signing in to authorize the Dropbox app, your app will need to be updated to use the system browser, in order to comply with Google's policy: https://developers.googleblog.com/2016/08/modernizing-oauth-interactions-in-native-apps.html
Without using the system browser you are limited to 50 authentications/users.
The following was emailed to me after trying to submit an app to the Dropbox gallery.
Without using the system browser you are limited to 50 authentications/users.