Here's what to do:
1. Tap on the Lyft logo in the top left of the screen to reveal the menu.
2. Tap on the “Payment” menu item.
3. Enter the promo code (david3880) under “add payment method” Your credit will be applied to your first ride! (Remember, this only works for new accounts.)
Free Lyft Promotion Code ($20 off) - David Kadavy kadavy.net > free-lyft-promotion-code
Using a Lyft Promo Code
Lyft Promo Code
Receive $2.50 off your first 10 rides ($25 total credit)
Use this code to receive $20 in free Lyft credit for your first ride.
Receive $3 off your first six rides ($18 total credit).
Best Lyft Promo Codes For New And Existing Users In 2021
www.ridester.com > Ridesharing
Open the Lyft app. Tap the menu item in the top left corner of the app. Tap "Promos" option. Tap "Enter promo code" where you will add your spelling sensitive code.
Lyft Promo Codes & Coupons | August 2021 Deals - Giving Assistant
givingassistant.org > Travel > Ground Transportation
Even though there are no promo codes for existing users, you can still get discounts and credits on Lyft rides if you keep an eye on promotions offered by Lyft. ... Free or discounted rides to events – Occasionally Lyft will offer promo codes, discounts, or free rides to special events.
NO Lyft Promo Codes For Existing Users? Tricks That Work 
www.ridesharingdriver.com > Lyft