Pretty good story, if kinda mediocre at times. The "twist" was blatantly obvious from the very beginning. Part of it was the title and thumbnail admittedly, but with a horror story involving rich people you can expect all manner of satanic worship / human sacrifice, murder, organ harvesting, etc. to take place. Frankly I'm surprised they weren't trafficking the children with everything else that they were doing. Not to say it's not rooted in reality, but this trope is so common now it's become cliché now. I'd almost prefer stories would do some kind of Lovecraft thing and pin the horrible shit on poor people and minorities for a change.
Doesn't really make a whole lot of sense to have a whole restaurant dedicated solely to killing its clientele. With such mass murder on an almost industrial scale, all towards the upper echelons of society, somebody somewhere is bound to notice all the disappearances. At the very least how are the families not noticing their loved ones missing? Not everyone is totally estranged from their families, you know (unless this is actually an exotic and highly elaborate suicide thing and not some murder restaurant, based on Dwayne's comments). It'd be far more believable if this was on the outside just a normal, if highly-secretive and ultra-exclusive restaurant that also did hits on people if you knew to ask.
Writing was fine for the most part, though it did delve into shitty purple prose at times, particularly that one line when he's talking to the old lady that was really annoying.