Maybe there is a discussion to be had about WHY it needs to make economic sense? Power is a natural monopoly, maybe it doesn't need to be a part of the economy?
If I'm not mistaken, proton didn't give anything to the FBI, they provided what was required by law to the Swiss government who then gave it to the FBI. It's a small distinction but it matters.
To be fair, they started working on the game before it was discontinued. I'm sure someone made a decision that it made more sense to continue on without support rather than start from scratch.