I looked this up just to make sure — it definitely, definitely is the majority of their
revenue. Net sales on Amazon.com for Q1 2021 were $75 billion. AWS and “other” combined were $19 billion. [1]
As far as profit goes, you have a stronger argument — $6 billion vs. $4 billion for AWS alone. AWS has a 30% operating margin, jesus.
[1] page 19 of https://s2.q4cdn.com/299287126/files/doc_financials/2021/q1/...