Suffice it to say that the realities of doing business internationally are complicated. One complication is that companies wanting to do business worldwide will, with probability 1, be asked to pay bribes. The US considers bribing officials to be anathema and will essentially exercise universal jurisdiction with respect to the act if committed by a US person or entity.

There exist laws in the US which are utterly non-enforced, and there exist laws in the US which are enforced vigorously, with extreme prejudice. The Act is, like most, somewhere in the middle.