The people who hire these cybercriminals tell them to do an easy job for them, and in return, they promise to give these hackers huge amounts of money and also will let them work in the future if they are successful and if they hack to the fullest of expectations. This is the thing that motivated black hat hacking, and you can hire hackers very easily nowadays by going on the internet and searching for them, or else if you have access to the dark web, then it is very easy to find them.