Ivan was never a mortal, and thus never rose to becoming a deity because of any supernatural forces. Instead, Ivan was and is a concept turned being. The ideals of the USSR formed into a single powerful entity. Ivan does not gain many followers, however he is dead set on gaining more to fuel the USSR and Mother Russia.
Devotion: Worshipers of Ivan must do one of the following in order to increase Devotion with him; converting someone to communism, killing “enemies of the state”, giving your servitude to Russia.