How (I think) the just 4 U double dip works

While I do my fair share of manufactured spend at Safeway, until this week I’d never actually redeemed any of their “just 4 U” loyalty points. Instead, I’ve been taking advantage of their upfront cash discounts on prepaid debit cards. Like many of you, that changed in a big way for me this week, and I’ve now redeemed enough points that I think I can explain how and why the just 4 U double dip works.

What’s a double dip?

Double (and triple, quadruple, etc.) dips represent travel hacking in its purest form: claiming credit multiple times for the same activity. For years you could claim Alaska and Delta flight credit for the same flights, for instance, so each Delta flight you flew would earn redeemable and elite-qualifying miles with both programs — a truly free lunch, my favorite price point.

You can also consider “negative” dips, the most common of which is so obvious people rarely bother to mention it: when you redeem miles or points for tickets or hotel rooms, you don’t receive the full value of the purchase, because the full value of the purchase includes the points you would have earned paying with cash! Redeeming 100,000 miles for a $1,000 flight doesn’t give you 1 cent per mile in value — it gives you 1 cent per mile minus the value of the miles a paid ticket would have earned.

People (myself included!) sometimes use the term “stacking” interchangeably, but at root there is a distinction. If you click through a shopping portal before making a hotel reservation, you’ll earn points through the shopping portal, through your credit card, and through the hotel. That’s a stack. If you click through 2 shopping portals and both of them ultimately pay out (not unheard of), that’s a double dip.

What’s the just 4 U double dip?

Once you start redeeming just 4 U rewards at scale, you quickly notice some wonky elements of the program, the wonkiest of which is that under certain conditions, the amount you owe for groceries can drop below $0 when an item triggers two different kinds of rewards.

You may occasionally be able to ask for a cash refund of the negative balance, but even if you’re occasionally successful the hassle for staff and managers is unlikely to make it a long-term cash-out strategy. Instead, you should try to spend down the resulting negative balance. Fortunately, that’s easy, because the usual rewards exclusions don’t seem to apply to these negative balances.

How does the double dip work?

I’m grateful to FlyerTalk user planetmans for pointing me in the right direction here, since the actual experience at checkout is quite confusing. There are, broadly speaking, three “buckets” of just 4 U discounts: “item” rewards (individual items that are free or discounted), “department” rewards (like the $3 produce and $7 meat department rewards currently available), and "basket” rewards which are triggered by the total price of your purchases.

Item rewards can be stacked as necessary to reduce the price of an item to $0. For example, the other day I redeemed one Reward for a free jar of pasta sauce, which was also on sale, so my receipt shows a $2.79 “Regular Price,” $0.80 in “Card Savings,” and a second $1.99 adjustment in “Grocery Rewards.” All of these are printed together and reduce the item’s price on the receipt to $0. Today I picked up the same jar of pasta sauce, no longer on sale, so the receipt just shows the $2.79 Regular Price and a $2.79 Grocery Rewards adjustment. There’s no double dip here.

Department rewards and basket rewards, on the other hand, are calculated and applied after the final price of each item is calculated. Since they are not tied to the price of specific items, they can reduce your amount due below $0. Hence in planetmans’s example, it’s essential to buy items from the produce or meat departments that are not free in order to trigger both department and basket discounts. That means the purchase of a $7.01 hanger steak will trigger both the $7 off $7 spent in the meat department reward and the $7 off $7 in basket rewards, creating a negative balance of $6.99 — the double dip.

As a side note, I can confirm the meat department Reward is triggered by vegetarian items in the meat department (Safeway carries Impossible and Beyond brand items, in addition to several I didn’t recognize). Unfortunately, there’s only so much vegetable protein slurry anyone needs, and it’s much harder to donate raw meat than non-perishable goods.

Once you understand the rules, the double dip becomes much easier to trigger. The biggest problem you’re likely to run into at scale is also the most annoying part of grocery shopping: unadvertised discounts. As in the example I gave above of the store brand pasta sauce, grocery stores are constantly fiddling with prices through “card savings” that are often not displayed prominently, if at all. You may find the perfect $7.01 lamb chop only to discover at checkout that Safeway decided to give $0.50 off the purchase of lamb chops, reducing your total meat department purchase price to $6.51 and killing your double dip. There’s no fail-safe way around this, but you can reduce your risk by checking your grocery store app and carefully inspect prices for any surprise “club savings” and things of that nature.