Prison; not jail. Yes: you will go to prison in many Western countries if you are a seller committing massive tax fraud. Having sweatshops from Asia doing it does not mean it's not easier if it's sanctioned by the devs and at the very least you can get a permanent ban in the game if you are the buyer which is something some people might find very important to avoid especially if their account is 10+ years old and they don't want to risk it just to get 100k from a shady dealer.