The image above is from the mainstream horror film Hostel 2.
Some have attepted to redefine Hostel 2 as "torture porn" but I'm not buying it because horror movies have always been full of grisly images of human being experiencing prolonged, agonizing torment, often followed by death. It doesn't seem to me that in the case of movies like Hostel 2 the fact that it's a human being rather than a supernatural being or event that is the cause of all the misery isn't an important distinction to make. They all suck equally in that regard.
(Full disclosure: I haven't seen Nightmare on Elm Street or any of its sequels, I haven't seen any Texas Chainsaw Massacre film, I HAVE seen Halloween but not any of its sequels. I haven't seen any of the Hellraiser films though I have seen a couple of nice-sized chunks of Hellraiser III (the one with Terry Farrell in the head harness) ... oh, the list of horror movie's I've not seen is long. I'm just not into SM, apparently unlike most horror movie fans.)
ANYWAY, so Hostel 2 is a mainstream horror film by any reasonable definition of the term. And the thing is, this vidcap from Hostel 2 could have easily come from many commercial bondage sites, especially those that feature lots of clothed bondage.
Really, look at the two hotties from Hostel 2. Imagine if you saw them tied up on a sofa or a bed in a motel room, exactly as they are tied now. You'd be thinking David Knight. You'd be thinking FM Concepts. Really, look at them, hands tied behind, sporting thin cleave gags, both bound hands behind, and both bound at the waist and feet.
The difference between the bondage imagery found in mainstream films, especially horror films, and the bondage imagery found on commercial bondage site, continues to dwindle.