Se7en's "What's in the box?!" ending would change significantly if you had to pay to find out.
And then there are movies like A Serbian Filme, where just reading the Wikipedia synopsis[1] is enough to nope the F out.
As others have said though, it is definitely a bit gratuitously sickening in places but not in a way that's out of step with the plot of the film. It almost crosses into the horror genre in places (in a Hostel or Saw franchise sort of way). If you're squeamish it's probably best to stay away.