Stealing credit card numbers is in illegal fundraising activity.
Stealing credit card numbers requires a successful Challenging Computers skill check. A successful check awards between $1-$100 in one day, with the best result granting $1-$300. Credit card hackers operate independently of one another.
When doing fraud, there is always a chance of detection. As the amount of money obtained from the computer skill increases, the difficulty in evading detection also increases, and there is always a chance for automatic detection.