I noticed that at early game, their rewards are so low that it would be a lot better to just conquer them instead of throwing 1000 gold their way for the ally bonus.
For example, i think in the classical era on quick speed, a cultured city state gives something like 6 culture? And yet monument + amphithearter is 5 culture by itself, and the city generates a lot more than just culture.
Mercantile CS is obviously worth it, because you get a lot more happiness than you could get with your own cities, but militaristic/cultured and to a lesser extent, religious, isn't very worthwhile to me. It's all fine if you get free influence from killing barbarians or whatever, but it just doesn't make sense to actively throw money at them.
For example, i think in the classical era on quick speed, a cultured city state gives something like 6 culture? And yet monument + amphithearter is 5 culture by itself, and the city generates a lot more than just culture.
Mercantile CS is obviously worth it, because you get a lot more happiness than you could get with your own cities, but militaristic/cultured and to a lesser extent, religious, isn't very worthwhile to me. It's all fine if you get free influence from killing barbarians or whatever, but it just doesn't make sense to actively throw money at them.