From today's live stram:
Pathfinder works like Mayan ability (cannot pick the same ruin perk more than once).
I found this article that would suggest that culture no longer increases with the number of cities founded. I really hope so because it got dull not getting the same bonuses as I would if I stayed smaller.
http://www.eurogamer.net/articles/2...yers-finally-getting-the-endgame-they-deserve