Always found Costco's largest source of profits interesting:
> Revenue from membership fees accounts for the majority of the company's profits, accounting for over 72% of the company's net operating income in fiscal years 2022 and 2023, and 65.5% in fiscal year 2024.[115][a]
> Revenue from membership fees accounts for the majority of the company's profits, accounting for over 72% of the company's net operating income in fiscal years 2022 and 2023, and 65.5% in fiscal year 2024.[115][a]
* https://en.wikipedia.org/wiki/Costco#Business_model