I see it kind of like high fence deer hunting. If you don't have the time, money, ability, or patience to learn how to hunt the prey, then you might as well pay somebody else to show you how. If you are a steward of the land and it's occupants, then you will become a true hunter and do what is necessary to educate yourself on how to "hunt" what you are hunting. If not, then I consider you a "shooter" (and I use that term loosly), and you are best off just paying somebody to take you out, point to the animal, load your gun, make sure you have a solid rest, and tell you when to shoot...then patt you on the back, tell you you did a good job, and send you on your merry way.
IMO (for the little it may be worth), the only time I would pay for Predator hunting is to learn from the best in the business, in order to expand my current calling ability.