LimeRewards+ Visa Signature Credit Card — Carolina Trust Federal Credit Union is a personal credit card from Carolina Trust Federal Credit Union. The annual fee is No annual fee. The ongoing APR is 14.99% after a 0% introductory APR** for the first 12 months introductory rate. Signup bonus: And, get 3,000 bonus points for spending $2,000 in new purchases during the first 90 days.. Rewards: Earn Unlimited 1.5% Cash Back on purchases and balance transfers!.