I know of the author personally (although I probably only talked to him once or twice). He was something of a minor legend. His roommate was my TA for a class once and he told me that the author had some video game (Warcraft 3?) AI that would play against other humans and was ranked quite well on the leaderboard (better than most hobby players).
I have a feeling that there is an AI player rampaging on Isotropic, feeding on hapless human victims. You can download the executable and play against the AI using the built-in interface.
If you read over the documentation you'll find that there is some sophistication here, including the ability to know when to remodel Gold into Province or knowing what to Salvage. Also of note is that the fact that it sounds like the author is *capable* of writing more powerful ("classic" machine learning) AI engines but *chooses* not to in order to make the results useful to human players.
I'm a level 35 player. I played 3 games with the AI:
Game 1: Won 34 pts to 28 pts the first game: mostly a Bishop game that it seemed to play well.
Game 2: Won 27 to 24, using Chapel, Bazaar, Courtyard, 1 Explorer + 1 Expand against a Courtyard/BM? strategy (hard to tell exactly what AI is doing because log isn't as pretty) -- felt pretty close though. I think I only won because I Expanded Province -> Province to deplete the pile, but then again because the UI is more clumsy I didn't realize I had overtrashed my deck until it was too late, and then had to spend some time rebuilding.
Game 3: Won 83 to 47 last game. Key cards: Throne Room, Gardens, Village, Monument, Council Room, Loan. I used a draw your deck + play zillions of Monuments strategy and beat the AI's BM-like strategy fairly solidly.
Overall, quite impressive for an AI although I don't expect it to beat good players on engine boards. I get the impression that the AI buys a province every time it has $8+ so it just isn't setup for megaturns. I think it would play BM-style boards quite well, however.