/s

Yes, I have a friend who does this for a living. The trick is apparently to get a high enough rating that companies give you software pre-release, and you can vacuum up the low hanging fruit before everyone else.

He claims legacy car companies are bad at security and pay a lot.

Some people make a living off of competitive tennis, or golf, or even bowling.

But 99% of tennis courts aren't being used for by or for serious tennis-pros.