Check your emails for this offer. May be targeted. Terms and Conditions state:
*Terms & Conditions: $0 Delivery Fee for 24 hours - Offer valid through 30/07/2024. Valid only for the customer account associated with -your email-. Customers must activate the offer in order to qualify. Offer can take up to 20 minutes to become available post activation. Limit one per person per month. Available on select merchants. Offer cannot be used with another promotion on the same order. Other fees (including service fee) still apply. All deliveries subject to availability. Must have or create a valid DoorDash account with a valid form of accepted payment on file. No cash value. Non-transferable. Delivery fee discount will auto-apply at checkout, no promotion code required.
I have a week long "Superpass" after it saw I wasn't interested in day pass. Afaik both are $30 minimum spend and it is a promo code, so I have not found it worthwhile to get free delivery rather than 30-40% off.
It also doesn't reduce the service fee at all like Dashpass does.