Online blackjack is a game that is typically played with a computer. Players bet on the number of cards that will be drawn before the hand is over. The house edge in online blackjack is about 0.5%.
This means that for every $100 wagered, the house would win $5. This does not mean, however, that the game is rigged.
There are a few factors that can affect the outcome of a game. One of these is whether or not the cards are randomly generated or not. If the cards are generated, then there is no way for the house to rig the game in their favor.
Another factor that can affect the outcome of a game is how good the player is at playing. If a player is not very good, then they may not be able to beat even a rigged game.
So, while online blackjack may have a small house edge, it does not necessarily mean that it is rigged.
