It's pretty much accepted that it's possible to count cards at land-based casinos. But many players will point out that counting cards are impossible at online casinos. In truth, this isn't true. It's perfectly feasible to count cards with online live dealer games. Having said that, much will depend on how often the dealer shuffles the decks. Or, as it's better known, the deck penetration. This is the most important factor and will decide if you'll end up making a decent profit over time.