You're saying real estate companies actually pay people to investigate "haunted" houses?

That's crazy

I don't think so. In my state you get a few days to do a "neighborhood review." If you, as a prospective buyer, walk around to all your potential neighbors and they start telling you about all the ghost stories and freaky stuff that happens in your house at night, you'll probably pull your offer. In aggregate there's money lost. And where there's money lost, there are people trying to fill those gaps.