Also casinos like it to have both ways, many players out there are thinking that they do the count right, but the noise and casino attractions many times make them lose their attention and therefore doing improper bets. Those are the guys which lose more when they count.

And more than that, winning by counting at blackjack don`t come just instantly and in big amounts. It just come you are ahead after many, many, many hours spent at the blackjack table doing it right and whitout anyone to spot what are you doing. You have also to have a talkactive profile while counting and that not easy at all ! And don`t do it at a table with CSM.

Online casinos each shuffle the deck(s) after each hand so counting is irrelevant. Exception is Live Dealer Blackjack but these have usually at least 6 decks and a maximum penetration (shuffle point) of 50%. This means that after 3 decks out of 6 was discarded, a shuffle will be made. This is nowhere near close to overcome the edge, you would need at least a 75% penetration in a 6 deck shoe game. (and at least a 67% penetration with a 2 deck game)