Half of United Kingdom consumers prefer credit card rewards to low interest rates, according to the latest issue of Cardbeat, a syndicated market-research tracking study run by United States-based Auriemma Consulting Group. Cardbeat surveyed 502 credit card users during the first quarter. The study found that 13% of credit cardholders would use a card more for its low interest rate. Cash-back cards remain the most-popular award, according to the study. Respondents viewed Barclaycard's Platinum card as the best cash-back card, offering cardholders 2% cash back on purchases made at petrol stations and supermarkets and 0.5% on all other purchases. Petrol-based rewards offer great potential, the study findings suggest. Though 5% of cardholders have petrol-based rewards, 56% ranked the benefit as highly valuable, the study found. Respondents viewed the Citi Shell MasterCard as the best value, offering up to a 6% rebate on fuel purchases.