"Almost none, with two exceptions I know of," says Tedas Sedavasen. "Many of the longest-standing agreements among the gods and the organizations each of them commands regard intervention in the Material, and they tend to restrict it. Communicating information discovered or refined in an afterlife to the Material is exceptionally costly. The two occasions I know of where significant trade exists between the Material plane and an afterlife are major interventions by Shizuru and by Asmodeus, respectively. Shizuru backed the Lung Wa Empire for about nine hundred years, with legions of angels, in exchange for the right to choose the emperor's successor, and ceased that intervention when prophecy broke. Asmodeus provides Cheliax with books and other resources mass-produced in Hell in exchange for Cheliax pursuing Asmodean policies.
Both gods are ancient and powerful, and my understanding is that this is incredibly expensive for them, with the circumstances those rare ones under which despite the high costs such trade is favorable both for the god and for the subject organization in Golarion."