Credit Card Safety:
The Online casino software makers are at the forefront of security and encryption. In my time as a player and as, a portal owner I have never heard of anyone having their credit card information stolen. I have also not heard anything through various gambling forums and through the Gambling Portal Webmaster Association. If players have had problems in the past, they were probably quickly refunded as the Credit card companies usually do in cases of credit card theft.
Most players use their credit cards for the first couple of times, but then sign up for one of the online blanking options.