Platform 2025-05-08 9 min read

90-Day Expiry & Fair MIR Rules: How RynoWallet Keeps Loyalty Sustainable

By RynoWallet Team

The Liability Problem with Loyalty Programs

Every loyalty program creates a financial liability. When you issue coins, points, or rewards to a customer, you are making a promise: these tokens can be redeemed for real value at a future date. If too many promises accumulate and too many are redeemed simultaneously, a merchant can face an unexpected financial burden.

This is why many large retail loyalty programs fail: they issue rewards generously, accumulate enormous unredeemed liability, and then either devalue the rewards (breaking customer trust) or face unsustainable redemption pressure. Subway's Sub Club, various airline loyalty programs, and several major retail cashback schemes have faced exactly this problem at scale.

RynoWallet is built to avoid this from the ground up, through two core mechanisms: 90-day coin expiry and the Minimum Issuance Ratio (MIR) rule.

The 90-Day Expiry: Designed for Urgency, Not Frustration

RynoCoins expire 90 days after they are issued. This might initially seem like a disadvantage from the customer perspective, but it is actually a carefully designed feature that benefits both customers and merchants.

For customers: The 90-day window is long enough to be comfortable (3 months is generous for daily shoppers) but short enough to create engagement urgency. Customers with coins approaching expiry are motivated to visit shops in the network to use them. This urgency drives repeat visits that would not have happened otherwise.

For merchants: A defined expiry means the liability does not accumulate indefinitely. A portion of issued coins will naturally lapse before redemption, which reduces the effective redemption cost of the loyalty program. Merchants can model their loyalty economics with confidence, knowing that their maximum potential redemption liability is capped by the rolling 90-day window.

How Expiry Creates the Engagement Flywheel

Consider a customer who earned 60 RC in January. By April, those coins are approaching their expiry. The customer is now actively motivated to visit shops in the network to spend them before they lapse.

This visit generates a new purchase. The new purchase generates new coins. The new coins restart the 90-day cycle. What began as urgency to avoid losing coins becomes a habitual pattern of shop visits—which is exactly the loyalty behavior that the program was designed to create.

The expiry date does not frustrate customers—it energises them. They are not losing value; they are being reminded to claim value they have already earned.

The MIR Rule: Engineering Network Balance

The Minimum Issuance Ratio (MIR) is a governance rule unique to coalition loyalty networks. It ensures that every merchant who benefits from the network (by accepting coins for redemption) also contributes to the network (by issuing coins to their customers).

In RynoWallet's implementation: a merchant can redeem up to 3x the value of coins they have issued in any given period. If a merchant has issued 1,000 RC worth of coins, they can accept up to 3,000 RC worth of redemptions. If a merchant issues 5,000 RC, they can accept up to 15,000 RC in redemptions.

This 3x ratio is designed to be generous enough to accommodate natural variation in customer behaviour (some shops have more redeemers than issuers in a given month) while preventing systematic free-riding (shops that accept lots of redemptions without contributing coins to the network).

Who the MIR Protects

The MIR rule protects three parties simultaneously:

  • Merchants who issue generously: They are protected from neighbours who accept redemptions without contributing, which would drain the network's coin supply unfairly
  • Customers: They are protected from a network where coins lose value because merchants stop issuing—the MIR ensures issuance continues
  • The network itself: The MIR ensures the coalition remains economically balanced and sustainable as it scales

What Happens If a Merchant Approaches the MIR Limit?

The merchant dashboard tracks the MIR ratio in real time. When a merchant's ratio approaches 3x, the dashboard flags it clearly. The solution is straightforward: increase coin issuance (issue more coins per transaction, or issue coins on transactions where you previously skipped).

In most cases, merchants who consistently issue coins after every customer transaction will never approach the MIR limit. The limit is most relevant for shops that occasionally skip issuance—it is a gentle governance mechanism, not a punitive constraint.

The Economics Work: A Simple Model

At a typical earning rate of 10 RC per 500 INR spent (2% of bill value in coins), the math for merchants is clear. If all issued coins are redeemed (worst case), the cost is 2% of gross revenue. Most loyalty programs in large retail chains operate at a 2–3% reward rate. The difference is that RynoWallet's structure limits redemptions through the MIR and reduces liability through the 90-day expiry.

In practice, the effective cost is lower—some coins lapse, some customers are infrequent redeemers, and the MIR caps total redemption exposure. The result is a loyalty program with costs that are predictable, manageable, and far lower than the revenue benefit of retaining loyal customers.

Build Sustainable Loyalty with RynoWallet


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