https://www.fool.com/investing/2024/01/10/amazon-e-commerce-...
"In 2023, Amazon accounted for 37.6% of all e-commerce sales in America, which was light-years ahead of second-place Walmart at 6.3%."
Amazon is highly successful even without AWS.
OpenAI don't make money because they're losing money on inference. If you remove their capex - training costs, which you can't because they have to remain competitive, they'd still be losing money.
Leaders in their market, at first because of a small moat and large advance, then the advance shrink but the brand will stay first for at least a decade due to brand recognition.
The Amazon comp works less, unless openAI start to suddenly build the sell their own chips.