Actually there's a spinner at the bottom of the window. (That's not visible in screencast because it is a little bit small.) However it does not have words, it's just an animation.
Yeah, this one's a fun issue to deal with, especially on Android where there are some (rather large) manufacturers who seem to forget that UUIDs are supposed to be at least relatively unique. I know of at least one major device line that uses the same UUID for all its devices, however, there are probably more out there.
Our only advertisement is now is app link that appears on Facebook posts (as 'via') and a default message for empty tweets.
It is a nice idea anyway, thanks.