A:AnswerYes - we used ours for groceries at Aldi and Publix. We purchased/ordered them through the Instacart App. Enter the Gift Card code during your checkout - just like any gift card you'd use at any store.
A:AnswerWe purchased an Instacart Gift Card from Best Buy and used it to purchase groceries at two different stores through the Instacart App. So yes, you can use it for product, not just a membership fee (which we have never paid on Instacart....)