I've been playing since 1.3, what part of it did you find baffling? you are not rewarded based on game performance, it is completely random to the point I don't

I've been playing since 1.3, what part of it did you find baffling? you are not rewarded based on game performance, it is completely random to the point I don't even think about it and so I'm always focused on having fun. it just so happens that I seem to get good cases that I was able to sell for a bit of change but it is not like you can play 20 hours every week and make consistent money.