Actually, you have the idea down very well, but you're missing (or you didn't state) one key point: Bonuses.
so it's been a while and maybe I just need to look at my copy of Theory of Blackjack but, how do online casino's calculate house edge?
The house edge remains the same for online casinos and land based casinos. The numbers never change as long as the game itself never changes. You can calculate the house edge simply by filling in the appropriate blanks at Ken's basic strategy engine:
http://www.blackjackinfo.com/bjbse.php
It seems to me that since online casinos shuffle after every hand that the conclusion you draw is:
Online casinos have X% advantage over you in the long run ON YOUR INTIAL HAND.
The house advantage remains the same, no matter how many hands. You already stated why ... the deck never diminishes. The same 2 of clubs you just had could be back again next hand. This is similar to a CSM (constant shuffling machine) that many land based casinos are bringing to the pit.
But if you play with this understanding then there is no beating an online casino since you aren't playing to a DIMINISHING DECK where your odds are evening out (averaging out).
There is no beating any casino where it's impossible to use skill rather than dumb luck. Luck alone may carry the day, but relying on that is a bad idea. You don't try to beat the online casino ... you try to lose very slowly so you clear the withdrawal requirement with a good chunk of the bonus money.
I feel like I have steped into consipiracy theory territory since I know that the casinos have to rake in a certain percentage (otherwise why be in buisiness?) and I am wondering where it actually comes from.
The online casinos make plenty from the slots and other poor EV wagers. Even in Blackjack not following basic strategy will cost you. But rather than explain something that others have spent hours researching, I'll supply a link that explains it:
http://www.bonusbug.com/cgi-bin/yabb...num=1109632125
I hope this answers your questions. Good luck if you decide to travel the bonus money path. It can be very profitable with little risk.