Can't pay using google pay, they've gone the same stingy route as spotify/netflix in that they'll not allow this payment method due to google charging a small transaction fee, don't see why they won't allow this option as they still have to pay a transaction fee when using a debit/credit card. Guess I'll be sticking to YouTube music which is fine by me (even the free version is good enough) and if I want something in higher quality I'll just find another way to download the song/album for free.