So you're guaranteed $2 when playing a Venture, making it another "Strictly Superior to Silver $5 Treasure Card".
Except at this very unfortunate moment for my opponent...
There is 1 province left and score is
Arsenic03 28-33 heatthespurs. So whoever grab the last province win.
--- Arsenic03's turn 20 ---
Arsenic03 plays an Alchemist.
... drawing 2 cards and getting +1 action.
Arsenic03 plays a Moneylender.
... trashing a Copper for +$3.
Arsenic03 plays a Gold.
Arsenic03 plays a Venture.
... revealing and playing a Potion.
Arsenic03 buys a Duchy.
Arsenic03 returns an Alchemist to the top of the deck.
(Arsenic03 draws: 2 Alchemists, an Estate, a Province, and a Jester.)
--- heatthespurs's turn 21 ---
heatthespurs plays a Menagerie.
... revealing a Copper, a Silver, an Estate, and a Horse Traders.
... drawing 3 cards and getting +1 action.
heatthespurs plays a Horse Traders.
... getting +1 buy and +$3.
... discarding 2 cards.
heatthespurs plays a Gold, a Silver, and 2 Coppers.
heatthespurs buys a Province.
heatthespurs buys an Estate.
(heatthespurs draws: 2 Coppers, 2 Ventures, and a Menagerie.)
All Provinces are gone.
heatthespurs wins!
#1 heatthespurs: 40 points (5 Provinces, 2 Duchies, and 4 Estates); 21 turns
[38 cards] 4 Menageries, 3 Ventures, 2 Villages, 1 Horse Traders, 1 Jester, 1 Moneylender, 1 Oasis, 10 Coppers, 2 Silvers, 2 Golds, 4 Estates, 2 Duchies, 5 Provinces
#2 Arsenic03: 31 points (3 Provinces, 3 Duchies, and 4 Estates); 20 turns
[30 cards] 3 Alchemists, 3 Horse Traders, 3 Jesters, 3 Villages, 1 Moneylender, 1 Scheme, 1 Venture, 2 Coppers, 1 Potion, 2 Golds, 4 Estates, 3 Duchies, 3 Provinces
Due to Venture hitting a potion, he gets a 7 and miss the final province. I am sure it is pretty rare, though it may be nice to issue a warm reminder that this could happen (and may cost you a win)