From now until September 8, 2021, US customers can get a hefty discount off their grocery order. The latest Apple Pay promotion gets new Instacart customers $30 off any order of $50 or more. Existing customers also benefit from the promotion with a smaller discount.Existing Instacart customers can get $5 off an order of $35 or more. If you subscribe to Apple Pay emails, you should have received a promotion code. If not, you will find a promotion banner to click at the top of the iOS Instacart app once you have Apple Pay enabled.