You really cannot draw conclusions on whether it's rigged or not based upon a few random rounds where the luck wasn't necessarily falling within ones favour. Just curious, but from where is this data found? How do you figure they draw 20 more than 50% of what they should? Is it simply based on limited personal experience from a few random sessions or does this encompass a wide range of stats compiled by many players over an extended period of time? Very bad considering the odds are already in the favor of the house. As someone that has written a blackjack app I was surprised to see the house win 50% - 200% more so than what basic math allows depending on how many people are at the table.
The 'dealer' lands a 20 nearly 50% more than it should. The ratios confirm that gta's blackjack is off from the norm by a considerable margin.