Load your card at a King Soopers Customer Service desk with cash, check, or credit card. Laurie Hughes and mentor Howard Fishman reload their cards by using the credit card they'd normally buy groceries with so they still get those perks (e.g. airline miles).
Use your reusable King Soopers card when you buy groceries. Reload it as needed.
662 gets 5% of the amount you load onto the reusable card, so keep reloading it. Don't ever throw the card away!