Theatre Venue
Victory
Worth 1% plus an additional 1% for every 2 Villagers you have (rounded down).
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When you gain this, if you have no Villagers, +3 Villagers, otherwise +1 Villager.
A VP card that scales with additional Villagers. Some of the other Villager cards could make this busted, so I am thinking it may be too good as is. I am thinking of changing it to be a set bonus VPs for just having a minimum number of Villagers, something like +2 VP for having at last 4 Villagers or something. It is still a decent source of villagers regardless and can be remodeled if that is an option in the Kingdom if you are not going "big villager". Feedback would be appreciated.
Villagers are unbounded, so the infinite VP, endless game potential here might be quite likely? (Patron and Expedition don't push the game to its end.)
It is a good point that Villagers are indeed uncapped. I still want it pseudo scaling with the number of villagers you have, so I changed it to be capped based on how many Theatre Venues you have.
Theatre Venue
Victory
Worth 1VP plus an additional 1VP per set you have of Theatre Venue - 2 Villagers.
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When you gain this, if you have no Villagers, +3 Villagers, otherwise +1 Villager.
Updated the original post here. Hopefully this change will address the potential infinite VP concern without nerfing the card too hard.
I don't think the potential danger of a golden deck with one of only two specific two-card combos* requires making Theatre Venue significantly more complicated (I consider your original version much simpler and more elegant than the update).
You'd already need two Theatre Venues (original version) in your deck (i.e. two otherwise dead cards) just to make Patron equivalent to Monument in terms of VP's gained per turn, and Monument is an official card that allows for a (weakish) golden deck without any help (except for a trasher). And just like Monument, Patron and Exploration do push the player toward buying more cards instead of building a golden deck, by giving $2 or 1 Coffers, respectively.
Finally, I don't see any "Villager golden deck" with TV even coming close to the Fortress-Bishop golden deck (which is guaranteed to give at least 12 VP per turn indefinitely): E.g. Exploration+your original TV gives at most 4 VP per turn, even if you managed to get all 8 TV's.
*Actually, Patron+TV is rather a 3-card combo, as you also need a strong trasher to create this golden deck.