Amazon defines this as:
Includes annual and monthly fees associated with Amazon Prime membership, as well as audiobook, e-book, digital video, digital music, and other subscription services.
2014: $2.762 billion, 2015: $4.467 billion, 2016: $6.394 billion.
Last reported quarter 2023 Q1 it was $9.66 billion, up by 15% year-over-year from $8.41 billion. From $31.77 billion in 2021 it increased by 11% to $35.22 billion in 2022.