https://www.billboard.com/articles/business/8548657/amazon-music-customers-user-metrics
Amazon Music now has more than 55 million customers globally across all its streaming offerings, while subscriptions to its premium Amazon Music Unlimited service grew by more than 50 percent over 2019.
Back in July, a Financial Times report named Amazon the fastest-growing music streaming service globally, with more than 32 million subscribers worldwide at the time. The report also stated that Amazon Music Unlimited had grown 70% over the past year.
Read the whole article at Billboard.com