This article analyzes a disastrous discount‑stacking case, identifies three core vulnerabilities in e‑commerce promotion logic, and presents a three‑part defensive framework plus a financial rescue toolkit to prevent massive losses and curb scalper abuse.
The article details Baidu’s 2020‑built commodity promotion system for Baijiahao and live‑stream e‑commerce, linking merchants with authors/streamers through CPS billing, three user interfaces and five core services, and highlights technical choices such as dynamic‑library tracking, asynchronous batch writes, and a high‑cohesion, low‑coupling architecture requiring cross‑team collaboration.
The article outlines Vivo Mall’s new independent promotion system architecture—introducing a unified discount model, flexible pricing engine, and scalable, high‑concurrency design—while detailing technical solutions such as Redis caching, batching, hot‑cold separation, rate‑limiting, idempotency, circuit‑breaker safeguards, and lessons learned from Redis SCAN and hot‑key issues.
