There are thousands of things that are illegal, but in practice are rarely or ever prosecuted, even in cases where people are violating those laws at pretty significant scales.
In my case that's not a risk I'd be willing to take, but I can see why other people would. The reason it's not prosecuted though isn't because of companies, it's because there are lots of wealthy people who travel overseas and then get kidnapped, and the government isn't going to prosecute their families for paying to not have their kids dismembered and the videos posted on YouTube. The reason companies aren't prosecuted is mainly because once you decide not to prosecute families for doing this, then anyone else can make an equal protection argument.