I expect it may be partly insurance but there is also not much competition in something like this so they can charge a higher price as you can't shop around with it being quite an unique opportunity.
But what's so unique about pushing some meat through the fence? It's not worth £168.
They are also offering an experience to meet some red pandas. Before you all go to book this thinking you're gonna cuddle some big cute cuddly pandas (like the one in the You Tube video who was scared witless when her baby cub sneezed), Red Pandas are tiny, they like more like tiny monkeys. Whoop-di-doo... :wait: