These casinos are the best in Nevada because they offer the most favorable blackjack rules for the player: single deck, double down on any 2 cards, and a 3:2 payoff on blackjack. If you play a good basic strategy, the house edge is just one-fifth of 1%. In other words, your average net loss is 1 bet per 500 hands played. In practical terms, winning and losing are equally likely.
Even though these casinos are offering an essentially even game, they still make money from players who don’t know the basic strategy and guess wildly about hitting and standing. Also, some gamblers over-bet and lose their whole bankroll in a losing streak. Players also make less-favorable bets like the blackjack side bet, or play other games like slot machines or roulette, which have a higher house edge.
Card counters, please do not count cards at these casinos! That’s like killing the goose that lays the golden egg. The best way for the casinos to stop card counters is to make the rules less favorable, like paying only 6:5 on blackjack. That would ruin the game for everyone, card counters and basic strategy players alike. If you ignore my advice and do card counting anyway, please bet conservatively and leave within one hour, so you won’t be suspected.
Remember that both winning and losing streaks will occur. You can lose even with a zero house edge, and even when card counting. To ensure an enjoyable time at the casino, risk only what you can afford. Have fun and good luck!