Milking the Monster

A foul beast from the depths of the abyss terrorizes a small peasant village. It devours their livestock, it kidnaps their children, and the less said about what it does to their women, the better. A band of purehearted heroes hears of their plight and sets off to slay the monster. The town mayor meets them at the gates to greet them...and insist that they leave immediately.

"Kill the beast?" he laughs. "Why would we ever want to do that? Ever since he showed up, the king has paid us more in aid money than we'd ever get through farming! Now turn around and head home, before I have to send the mob after you with Torches and Pitchforks!"

Sometimes it happens: the monster makes money, and its purported "victims" — or a single shrewd (and often heartless) member of the public — will put up with it, or even harness it for the sake of the benefits it brings, despite the harm it causes.

Compare Monster Protection Racket, in which the profiteer has a more active role in the matter. Not to be confused with Milking the Giant Cow.

Film

 * In Dragonheart, Bowen is a disgraced knight turned dragonslayer who succeeds in almost driving dragons to extinction in search of the one who he believes was responsible for his pupil's Face Heel Turn into a Complete Monster. The last one, who eventually picks up the name of Draco, fights Bowen to a draw and suggests a way they both can survive: Draco mock-terrorizes villages and Bowen shows up to offer to "slay" him for an exorbitant fee.
 * In the finale of Ernest Scared Stupid, Chuck and Bobby take photos of the rampaging trolls in the hope of making a fortune off the merchandise.

Literature

 * In the novel Star Surgeon by James White, the Monitor Corps goes to help a planet where disease runs rampant. Dr. Conway.
 * In The Icewind Dale Trilogy Drizzt goes to steal a magical mask from the lair of a banshee and is surprised when the local townsfolk ask him not to kill her. They explain that her presence provides some protection from orcs and other monsters, is good for tourism, and she mostly just wants to be left alone, only attacking people who invade her lair.

Live Action Television

 * Torchwood
 * A twisted version appears in one episode: the "monster" is actually harmless, something along the lines of a tremendous alien bovine with an incredible Healing Factor. The people who capture it harvest it as an endless source of meat. True, the meat is apparently safe for human consumption, but in contrast to the show's tendency for Aliens Are Bastards, this monster is actually a non violent, peaceful slug like being that is being cut apart for meat while it's still alive, and the true villain is the asshole in charge, who ignores the Torchwood-3 team, his own conscience ridden Mooks, not to mention his own conscience, blithely ignoring the agony he's causing a perfectly innocent alien by telling everyone "it's only meat."
 * In the episode "Reset", a medical firm that is in some way an Evil Counterpart to Torchwood-3 harvests alien material to make medical advances for the benefit of humanity. Unfortunately, the leader is a Mad Scientist who coldly tortures and exploits aliens like the villain of "Meat", and he callously eliminates humans he has used as guinea pigs for his alien derived treatments if it might expose what he has done.

Video Games

 * In Dwarf Fortress, a lots of critters become a part of industry - mostly domesticable (if you can get them into cage trap and then train) - but not limited to these.
 * Giant cave spider is one of the most dangerous of all widespreead critters, but giant cave spider silk produces the second most valuable cloth in the game (and the most valuable cloth from a renewable resource). Clever players look for ways to corral one into an inescapable area where it can still see and spit silk at their Dwarves, domesticated animals, or captured prisoners. Randomly generated creatures also sometimes have web-slinging, but they are harder to catch and contain, and it's not especially valuable (though still comes free and indefinitely) - but it sometimes has "interesting" properties, such as being fire- or even magma- resistant: fireproof cloaks/hoods may prove useful if you're playing with fire (or fire creatures), and you can build minecart rollers in magma without wasting magma-safe metals on chains anymore, though there are more exotic uses.
 * Crocodiles (especially Cave crocodiles) may be dangerous, but are butcherable for valuable materials, make good guard beasts (or just living deathtraps) and produce edible eggs. Lots and lots of eggs.
 * There have also been incidents in which players rigged up ways to farm other creatures for harvesting. This ranged from a case where an ocean was manipulated for the purposes of getting at the walruses that lived within, to a more gruesome case where mermaids were beached and killed for their bones, which, at the time, made for high-quality crafts for selling (though Toady has since devalued them, evidently disgusted by the prospect).

Western Animation

 * A recurring event on Scooby-Doo! Mystery Incorporated. The Scooby Gang exists to solve mysteries; unfortunately, Crystal Cove's primary source of income is spooky tourism, and the mayor (Freddy's dad!) and the eternally ineffectual sheriff don't appreciate them exposing every Monster of the Week for the hoaxes they really are.
 * The town in Scooby Doo and the Witch's Ghost does the same. Then we learn there really is a ghost.
 * A variant appears in the Adventure Time episode "Donny". The eponymous character is an obnoxious grass ogre who enjoys terrorizing a town of house-people: Finn and Jake manage to make him mend his ways, but it turns out that his noxious presence was the only thing keeping a ferocious pack of whywolves at bay. In the end, they have to convince Donny to go back to his old self, or else the whywolves will devour the entire town.