May be that the purpose of the test is the ability of hackers to work for yourself or others as a result, there are a lot of people want to be hackers.
Maybe it is because the purpose of the test is the ability of Hackers themselves, or work for someone else, therefore there were a lot of people would like to be Hackers.
This may be because it is a purpose of the Hackers is to test the ability of their own work, or other people, resulting in many people wanted to be Hackers