Playing as Siam, I like to have whatever influence I can get with CS's, so the Papal Primacy founder belief is a good thing to have. It will bump up the resting point with CS's that follow my religion by 15.
However, I discovered that this increase doesn't come immediately. I used a GPr to bring my religion to a couple of CS's (with no other religion present) but noticed the resting point of my influence in those CS's did not increase. I knew the CS's were following my religion because my religious icon appeared by the city names. It took a few turns for the resting point to move up, but it did.
However, I discovered that this increase doesn't come immediately. I used a GPr to bring my religion to a couple of CS's (with no other religion present) but noticed the resting point of my influence in those CS's did not increase. I knew the CS's were following my religion because my religious icon appeared by the city names. It took a few turns for the resting point to move up, but it did.