Google has tweaked the developer policy for the Play Store with an eye on reducing intrusive advertising, spoof apps and clarifying subscription cancellations. Apps that pass themselves off as others, or are "confusingly similar" will now be pulled, so say goodbye to those thousand instances of Angry Byrdz. Adverts that pop up in your notifications window, like Airpush and KDDI's au one now make their way onto the verboten list. It's also clarifying that when users cancel their subscriptions, they won't be refunded for the current billing period, but will continue to receive what they'd paid for until the term expires. Developers now have 30 days to comply with the changes, after which point apps that are found to be in violation will be pulled by Mountain View's overlords.