Hi Hayden. I am an American living in China who travels to Macau or Korea to play blackjack recreationally about once a quarter. The short answer to your question is: the conditions are very, very good for a basic strategy player in Korea, but there is nothing for the AP to work with in terms of card counting. I was playing in Busan/Seoul earlier this fall, and every table I saw had the following rules: Dealer stands on all 17s, player can double down on any two cards and after splitting, up to four splits allowed, player can surrender against any dealer upcard. Continuous shuffle machines are ubiquitous, as is the case everywhere in Macau, so card counters won't be able to capitalize on these favorable rules. Against the higher hand rate per hour with a CSM, I deliberately play very slowly, taking my time in between hands, talking with the pit and the dealer, and ordering drinks, so that I am exposing less of my bankroll to the house edge over time.
Speaking of the house edge, under these rules it is around .33 percent, depending on the number of decks in use (I imagine it is no less than 6). The rule allowing the player to surrender against any dealer upcard gives the games in South Korea an even more favorable house hold than the already good games in Macau . Another feature of the tables in South Korea is that the minimums to take advantage of these great rules are low, around 10 USD. This is much cheaper than in Macau, where around 200 (around 25 bucks) HKD is the minimum is most places, but casinos like MGM and Wynn have minimums as high as 500 HKD (around 63 dollars).
In terms of getting an edge in spite of the CSMs, I would say this: many of the dealers are quite green and are prone to hole-carding and making errors. I had one dealer who (when I was playing heads up) kept paying out my bet at even money when I would draw to 21 without taking any more cards himself. Eventually, the pit caught him and corrected his error, but never mentioned the multiple times he had done the same before. The next day at the same joint, I was able to take a hole-carding dealer to the cleaners, but did use careful cover, avoiding making plays like hitting 16 on a dealer 6 upcard (with a five in the hole), which would look suspicious to the pit, who had verbally confirmed pegging me for a basic strategy player the day before).
A number of the casinos in South Korea have generous match play and cash back offers that place these games head and shoulders above what the basic strategy player can expect to be able to make happen in Macau. I am not sure if it makes any of the games into advantage plays, but it likely makes them an even game, or close to it. It goes without saying that there is no comparison between these games and the rules that the player would face in Vegas at these sorts of minimum bets. So to sum up a long post: there are some opportunities there to play an even game or perhaps get a slight edge, but not by counting. Hope this helps!
Last edited by: musickman on Nov 5, 2018