With computer-based dealers, card counting is rarely useful. Either shuffles occur after each hand, or the dealer does not indicate when shuffles occur. However, some casinos offer live dealers via webcam. Live dealers are available with most Playtechs, Ho 368, Casino Webcam, and a few others that don't come to mind. Even with live dealers, it's a lot of work and time for an increase in house edge of maybe 1-2%. 1-2% is nothing compared to the player edge possible with bonuses.