I believe the essence of MadCapper's question was not what strategy should be employed to win at table games etc. (e.g., quit while you're ahead...duh
but whether or not online casinos can be trusted to deal the cards fairly. It's enough of a disadvantage to play table games with an honest deck, when the rules of the game are rigged in favor of the house. It's an entirely different can of worms when the "deck" being dealt from is a virtual one, and there is no way for the player to know whether the cards he's being dealt are being manipulated to make him lose.
This, I think, is a crucial issue that I've never seen discussed to my satisfaction on any forum or in any report. Yes, I know, online casinos love to brag about all the rewards they've won for high payouts, is there really a single, reliable, honest, verifying service out there that ensures that online casinos deal honestly? Forget about whether they actually pay when you win...how many of them even give you a fair shot at winning?
In my mind, there's nothing stopping the computer from being programmed (or a human being on the other side intervening) to ensure that online casino players lose. As I said, it's hard enough to win at honest blackjack, poker etc. without throwing in the debilitating X factor of dishonest casinos.
I, for one, play sports almost exclusively. Whereas I don't think twice about laying 600, 700, 800 dollars on a sports game (and often more), on those few occasions when I do play the online casinos for a couple minutes, I'm hesitant to ever bet more than 2 bucks, even though I know how to play blackjack. I just don't trust it, and no one's ever demonstrated a reason to think otherwise.
Come to think of it, I'm rather surprised that the U.S. government has never gotten involved in this issue. You keep hearing about the government possibly getting involved to ban online gambling, but that idea is usually bandied about with reference to sportsbetting, and because sportsbetting is illegal in the U.S., not because the books are necessarily dishonest or won't pay. But rigged online casinos are a different story altogether. Although I for one firmly believe the U.S. has no business relegating sportsbooks that are located offshore (provided, of course, that they pay their customers in a timely fashion), a business that aims to bilk American clients out of their money with RIGGED casino games should be prosecuted no matter where they are located. I would think many people would agree with that assertion: since gambling is not illegal in the jurisdictions in which these books/virtual casinos set up shop, the U.S. has no right to prevent people from using their private PCs to access those websites, play/bet the games, and risk their money. But if the casino can be demonstrated to be a sham, with fake games deliberately manipulated to cheat you, then the goverment should get involved. I would imagine that if a mail-order business (having nothing to do with gambling) located offshore bilked customers into sending them money for products that they never shipped, they would probably be prosecuted, or at least money would be prevented from being sent to their address, no matter where they were located.