Because people watch it. Simple as that. Although these days it is completely self funded, and UKTV just buy the episodes as opposed to them being commissioned. Last i heard UKTV pay only £5000 per episode! And it costs more than that to make an episode, but Antix need the show to stay on TV so they can help sell their MH Experience tours, that is where they make their money.
A bad ass who will beat you like he's using the fists of god.