They had $1b revenue in 2023 and now probably more than $2b in revenue... do you have cost figures showing what their expenses are?
Microsoft don't release the costs as you know, but
Compute and Storage for Free Tiers: Hosting code for over 150 million developers and processing over 2 billion GitHub Actions (CI/CD) workflows a month requires astronomical server power and data storage. The "Free" tier is a massive cost sink that Microsoft treats as a loss-leader marketing expense
Let me know when you understand how that's not free.
> We have since added more than 3 million CPU cores, 120 petabytes of high-speed storage, and significant network capacity. We installed as much hardware as available power allowed in our existing data centers while accelerating our migration to Azure.
That can't be cheap.