Snack Service is having a telepathic argument about whether to actually stop and Maledict the cultists! Why are Asmodeans so suspicious every time Snack Service suggests not sending somebody to Hell? Sure, Chaotic Good doesn't like it, but that's not the point here! If the cultists know they've failed, they'll try again sooner than they otherwise would!
Also, Cheliax might possibly want to observe how the Rovagug cultists are going to get past all their careful security. Because they totally would have if not for Snack Service!