Download the Crumbl app and join the Loyalty Program and get a coupon for $10 off after you earn 100 Crumbs. You can earn 1 Crumb per dollar spent, but you can also get free ones for easy things, like signing up for emails, joining the birthday club, and following Crumbl on various social media platforms. CLICK HERE to enroll online with the Sign Up / Sign In button, or find the app on your phone's app store. Plus, enjoy birthday rewards, and other perks. Who doesn't want a free cookie on their birthday?