● carry out large scale processing of special categories of data, or data relating to criminal convictions and offences. (qaeducation.co.uk)
If your card offers especially high rewards on special categories for a limited period of time, keep in mind you might have to register for these special reward periods. (money-rates.com)
Some cards offer up to 5 % on special categories of spending as well. (thecollegeinvestor.com)