6% of every purchase comes back to you in points, 8% for subscription orders. You redeem your points here, in the point shop, for products.
If you don't have a subscription: you get a coupon code when you redeem. Add the product to your cart, the code applies automatically, and the price becomes 0 at checkout.
If you have a subscription: you choose. You can request it for your next shipment (the points get deducted, we don't touch your subscription, and there's no extra cost), or as a coupon for your current order, the same as above.