To those that are having issues getting your license to validate, I was having that issue and was only able to get it to detect premium using cellular data with adhell3 disabled and having the latest play store. I don't know if my work wifi had some sort of filter that wasn't allowing it to go through. It's worth a try.
I have a bug report / feature request as well. Since it seems like manufacturers are putting things in the navbar, like Samsung's keyboard menu, etc., would it be possible to hide the pill and / or show the navbar when the keyboard is up? When I do this now, I'm selecting Swiftkey under the "Show NavBar in Selected Apps" but it just freaks out and bounces up and down a lot and eventually crashes.