Still no pass for me as well. it's been about a month now. I contacted Samsung and they confirmed they'll be sending the codes when they get it from Microsoft. They also acknowledged that the codes will be in groups like what Felix909 said, so it may be different times for everyone, however no specific or approximate time frame.
Update: I've received my XB GP code this afternoon. You should check your emails if you haven't done so. The code worked only on a new account and the app from google play store works fine. Good times everyone.