Yes, they do. Betting promo codes are common among licensed operators in the UK. A licensed betting site certainly has the edge over unlicensed operators regarding gaining bettors’ trust. However, having a UKGC license doesn’t mean bettors will automatically register with the platform with no concerted marketing efforts to lure bettors on its part. Licensed betting sites need to devise strategies to attract new customers, given the competitive nature of the online wagering market. For this reason, you’ll find a sizeable number of licensed UK betting sites availing promo codes to clinch new players and also retain their existing customer base.