@4d4m Said
The idea here is controlling both sides of the equation. Assuming these hypothetical "gods" are real, controlling a small number of people is easier than controlling a large group of people. If the masses can be kept superstitious enough, controlling their religious beliefs/leaders should be enough. To control the leaders of the society obviously royal families would be ideal. These families consist of a limited number of people. Indeed if they themselves could guarantee their part in those families it would help cement their rule.
Except with most multi-god mythologies, the gods weren't actually trying to control humans. Sure they picked sides in human conflicts... sure they periodically punished humans for their behavior (though typically regardless of whether or not the behavior was good or bad)...sure they liked to have humans worship them.... etc... But they didn't actually try to control humans.
To the contrary, the Abrahamic god is supposed to be all powerful and his focus is to control human behavior by way of religious dogma to the effect that if you do what he likes you go to heaven, if you do what he doesn't like you go to hell.
So, with the Abrahamic god the number of those being controlled is not an issue >>> as an all powerful god he can easily do literally anything he wants.
The idea of controlling both sides only becomes problematic when it becomes obvious to humans (any given human) that god is actually behind all the evil, pain and suffering in the world, since he is controlling all aspects of the situation.