Explanation:
Those are cheaters, you should already know.
At first, they hack into the game and use blank name and UserID so they can't get reported.
Still, this doesn't have any benefit other than the tokens, most of them do this either to tease the developers or for fun.
No, there's no confirmed update as of now.
Beta Programme/Beta is a feature of Google which allows you to get the updates earlier than others and send feedbacks to the developers to improve. Certain data will also be sent to the developers, you can also leave the beta at anytime. Basically a pre-plan.
However, this is not a sign of an update or a patch.