First time hearing this!
Why would you get a 5$ promo?
However if you subscribe to 2 of the 40 packs you’ll pay just $6.65 or $8.16 shipped depending on how many Amazon subscriptions you have. That’s just 8.3 or 10.2 cents per pack of oatmeal!
In order to subscribe to 2 subscriptions you have to first select “One-time purchase” and change the quantity to 2. Don’t add them to your cart, just click on “Subscribe & Save” and click “Subscribe now.”