Yes, Rewarder God theory was invented by the Jesuits right around the year 1600.
As St. Alphonsus pointed out, all the Scriptures and the Fathers teach that explicit knowledge of Jesus Christ and the Holy Trinity are necessary for salvation. But the Rewarder God theorists avoided heresy by claiming that the necessity for this explicit faith was a necessity of precept (vs. necessity of means).
HOWEVER ... in 1703 the Holy Office rejected that distinction, stating quite clearly that these things must be known by necessity of means.