You can almost always get free delivery to your favourite restaurants by following these steps:
- Change the delivery address to the desired restaurant.
- Check the "$0 Delivery Fee for orders over $20" section to see if your restaurant is here. Restaurants here refresh every 8-15 minutes.
- Once your restaurant pops up, place your order and go to the check out page.
- You will see at the checkout page a red message saying "you seem far from this address". Change the address to your actual address.
- You will be able to finish the order and still access the free delivery promotion.
I have tried this multiple times and have had success.
Hope this will help some people.