The Cajun sauce introduced a new flavor compared to the other McDonald sauces. Now that the BTS meal is no longer offered, people are missing out on the Cajun sauce. I’ve known people who would buy the BTS meal just for the Cajun sauce. For the people who haven’t tried the Cajun sauce, you’re missing out so you should sign up to satisfy your curiosity. Please sign to make the Cajun sauce a permanent McDonald’s sauce.