Personally I would skip, or at least smell-test, such calculations by a trip to the publicly available hard data: https://d18rn0p25nwr6d.cloudfront.net/CIK-000

Personally I would skip, or at least smell-test, such calculations by a trip to the publicly available hard data: https://d18rn0p25nwr6d.cloudfront.net/CIK-0001418091/947c0c34-ca90-4099-b328-a6062adf110f.pdf https://d18rn0p25nwr6d.cloudfront.net/CIK-0001418091/947c0c3... Twitters cost of revenue was 1.7B in FY2021. That includes their data centers, operations salaries, depreciation of assets, and AWS costs (plus other categories, it’s defined in the financials). There’s also a delta of 400M from FY2020 and over half of it is salaries. So from these pieces of coarse information and the suggestion in this piece that storage costs alone are around 1B, I can surmise that these envelope calculations are off by a lot.