How to become a tester?

As it came across this quote from BOR'a:
" *** Kisloukhin
B * Th, LOL.
Have you ever come across testers in real life?

*** Kisloukhin
The bottom line is that a good tester, in a sense, a tester by vocation is a person of a special mentality. We have 40 out of 50 - 50 testers are like that. The bottom line is that we have installed automatic machines in the buffet, which brew coffee, etc. Yesterday they installed a machine that gives out chocolates, crackers and chips. So here. Testers found a bug. Chocolates for 35 rubles can be bought for 9 rubles. They bought them all. Then they went and told the authorities. How they found him - x * knows. A coffee machine they tried to fool with xeroxed money. It did not work, but a bug was found.

*** Kisloukhin
Automatic just passed out. "
***
And I would like to know in more detail who are such testers? What are you doing, what are the terms of reference? What knowledge / education is welcome.

Are there any people on Habré who make their living by this difficult task, searching? :)
I would appreciate any information and feedback.