Cheliax at one point claimed to Keltham, apparently with Snack Service involvement, that Rovagug cultists were coming to kidnap him and would have the info to make it to his bedroom. Maillol - a fifth-circle priest of Asmodeus - supposedly, that is - said that Rovagug wasn't party to noninterference agreements.
How smart is Rovagug. Is It known to suddenly mind-control people.