Jack-in-the-Box Coupons + Free Birthday Treat! I may get paid for ads or purchases made through links in this post.August 5, 2010 By Heidi Leave a Comment Have you joined the Jack-in-the-Box ‘Secret Society of Cool People’? Once you do, you’ll receive Jack-in-the-Box Coupons throughout the year + a Free Jack-in-the-Box Birthday Treat! See Also: BIG List of Birthday Freebies! Save $$ with TheFrugalGirls.com! Follow on Facebook, get Free Email Updates, and get Free RSS Updates!