Scammers are now making small donations to charities in order to test their stolen information. Speculation is that financial institutions would be much less likely to notice this type of behavior.
The prevailing theory is not that the criminals are being altruistic Rather, security researchers believe the donations are being made to test whether a stolen card is still active, much in the same way that thieves test stolen physical cards at gas pumps, where there is little chance of anyone spotting them if the card comes up canceled.