Not exactly. A lot depends on the exact scoring model used, and the total number of inquiries/recently opened accounts. An open account with a significant line, and low utilization can actually RAISE your score, and can improve your overall ratios (like credit utilization, which is open lines/balance on open lines ). Also, these sort of 'affinity' cards can have promotional features that make them more attractive (e.g., cents off for purchases at the merchant). A couple of years back, the Shell card had 5% purchase rebate on gas purchases, with no annual rebate limits - they're typically less generous than that now...