I was able to get Pagoda+Mosque with Sacred Sites in my last game as Ethiopia (continents/standard size and speed/immortal), and it was really underwhelming. Granted, I got Sacred Sites a bit late, without having to, because I finished liberty before going Piety, but I had not much space anyway. Expanded through war, annexing my puppets as soon as I had enough faith to purchase the two buildings immediately. After beating Monty and the Swedish dude and settling on every little land chunk still available, I had all the lands in my continent (I think it was 13 or 14 cities), and by the Renaissance I already had them all annexed, all producing extra 4 tourism per turn. Seems good, but it is not good enough, because this tourism will not get Hotels/Airports boosts. I still got Culture Victory, but it was at T420. I could have got science or domination earlier than that if I really wanted (...and if the map generator was not a damn troll, putting zero aluminium deposits in my continent. Not even the CSs in the continent had it lol).