Organizers can add a promo code while creating or editing the tilt page. Rest assured only organizers need to add the code - contributors don't need to enter it while chipping in.
When starting a tilt on the web (or editing one!), click "Show more options" and then select the "Promo code" button:
On the app, add the promo code on the additional details page when creating your tilt:
Please note that you can now retroactively add a promo code to an active tilt by editing your tilt on the web!
Remember, promo codes help to make your tilt pages even more epic. Tilt reserves the right to suspend your account and revoke any bonuses if they were earned against our terms.