(Is it just a correlation that reformers are also winners?)
From some time i observed that starting location is crucial. If anybody is spawned near "early game-low-faith" civilization, such civilisation will welcome your missionaries and
possibly spend their own faith for spread it for you, boosting benefits from your founder building basically for free.. Im not 100% how AI evaluates if he likes your religion, if it is worth adapting as majority
Last game i had 1 gold per follower up to 10 (Thrift if i recall correctly) and both AIs adapt it in blink of an eye

But i also didn't had nearby any other civ with good religion.
So i had full buff from my founder, and also loyal allies, and also ultimately enough pressure to counter second major world religion, that was comfort usually i don't experience
However, if you are unlucky, and you are spawn in the middle of other religions without access to civilisation that didn't grab religion, you are basically screwed..
Since they will have easy access to them and also almost free "brothers in faith"..
If you try to spread to them, you could lose some spreading power while moving trough their territory, and even if you manage, then their pressure will be much better due to shorter distance..
That's why lately i started to focusing more on spreading religion to neighbours instead rushing second Prophet, since it increases the chance, AI will adapt it as majority.
Of course if this is possible, im starting in opposite direction than my conquering plans, since i dont want to "buff" my next opponent too much
So religion has somehow snowballing effect.. Usually, when i see some civilisation snowball out of control, usually their religion is also.. Not sure it is coincidence
But the question is who was first, the chicken or the egg

Last game Monty took 25% growth + 10 gold, which synergised perfectly, since it mitigated poverty nicely, which is very often main problem, and around Industrial era he was 10 tech ahead of everybody

So i guess, probably also, synergies are also the issue here.. But then again, being ahead in religion department allows you to make better decisions, which puts you in better position, and
allows you snowball more
