I don't know if I can answer your first question.
They use it at a "hunting ranch" in Texas. This place is a private game reserve...essentially a really, really big zoo where ridiculously wealthy people pay big dollars to hunt captive animals. They use this thing to drive around the ranch with the "hunters" on board. Because it's so high, they can see over the scrub brush, allowing the hunters to feel like they have some part in finding the game.
The thing is that the "guides" are the same guys who set the timers on the feeders for the animals, so they effectively control where the game is and at what time of day. They could get their clients just as close to the animals using one of these.