>If you want to justify the expenses of your infrastructure you need to explain where the money goes.
And they did. Comparing to anything is how a normal human would judge whether the spending is relevant. It is call price comparison. Whether it is a valid comparison is up to the person to decide. And more often that not when the two pricing are so vastly different that person should look a little deeper.
The comparison to Rust is meaningless.
Each project has different demands and requirements from their infrastructure.
For example, Rust compiles all open-source crates on a regular basis to test for regressions.
You can't just point to Rust and say, "Look at that guy."
If you want to justify the expenses of your infrastructure you need to explain where the money goes.