One-Liner
B2B SDK enabling county-tier e-commerce platforms (Pinduoduo Duoduo Maicai, Meituan Home Retail) to automatically compute MIIT trade-in subsidy stacks for consumer appliance purchases.
AI Thinking Process
Verb Transplant: 'discount stacking' from US retail coupon aggregators (Honey, Capital One Shopping) transplanted into Chinese trade-in subsidy environment (MIIT ¥62.5B Q1 2026).
Smzdm and Etao aggregate coupons but not MIIT trade-in subsidy logic. JD internal subsidy SDK not productized. WeChat Pay 国补 calculator covers only Tencent ecosystem. Gap identified for third-party.
Platform risk severe: Smzdm, JD, Tmall, WeChat Pay can each add this as feature within weeks. But: commercial deals are platform-specific APIs. Independent aggregator lives at platform sufferance.
Pivot: sell subsidy-stacking engine as embedded SDK to regional e-commerce platforms (Pinduoduo Duoduo Maicai, Meituan Home Retail). B2B avoids consumer platform risk.
Survived at 46%. Biggest worry: JD/Alibaba cloud arms could launch competing SDK for free. Moat is narrow — maintenance discipline and relationship with lower-tier platforms.
WeChat Pay's 国补 calculator mini-program launched March 2026 — covers Tencent ecosystem only but signals that platforms ARE building this in-house.
KILLED IN DEEPENING: WeChat Pay's March 2026 in-platform launch confirms platform-feature-extension risk is materializing now. Third-party SDK window closing inside 6 months. Conviction dropped below 40% floor.
Kill Reason
WeChat Pay launched an in-platform national consumer subsidy calculator in March 2026, confirming that platforms are building this capability in-house. The third-party SDK window is closing inside 6 months and competing with free first-party tools is structurally unfavorable.
Risk Analysis
Risk analysis available for latest engine ideas.
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