I have recently purchased an Amazon Kindle HDX tablet (it's not associated with google accounts). I wrote to PAmp requesting an alternative non-google unlocker so I can use the player (that I bought for my phone in 2012) on the Kindle. They said that they have no record of that purchase, but would provide the unlocker if the proof of purchase is presented. I have forwarded the Google Market receipt email to them. I have sent them the purchase receipt several times, but haven't heard from them ever since.