BlackJack @ PartyPoker

[Dodoubled]

I've played Party BlackJack, too. Not much, but just enough to get a feel for it. And enough to drop about 20 bucks.

Anyhow, some thoughts.
1.) It is possible to get +EV in blackjack, but there are a ton of factors that go into it. Playing perfect basic strategy is only the beginning. Deck size, the true count (the proportion of 10-cards and aces to the number of 2s through 6s, divided by the number of decks in the shoe) all factor into it. Even the best players (read, "counters") are only looking for an advantage of +1 percent or so -- and even that might be generous.
2.) That said, the biggest advantage an online blackjack game has over you is the inability for you to count anything whatsoever because we don't know the randomness with which the cards are shuffled. Does the computer use a single deck, a four-deck shoe, a six-deck shoe or an eight-deck shoe? Or, does the computer shuffle every single time, nullifying any semblance of a true count? My bet is on the latter.
Remember, this isn't like poker, where a single deck is shuffled before each hand. A player's advantage in blackjack banks on what has been played, and more importantly, what hasn't.