Dulu, konten seperti JUQ741 dengan mertua hanya bisa diakses melalui forum khusus atau DVD bajakan. Sekarang, berkat streaming ilegal dan diskusi sosial media, ia menjadi konsumsi publik yang "normal". Ini menandai pergeseran besar: apa yang dulu dianggap niche, kini bisa menjadi trending content dalam hitungan jam.

| Risk | Impact | Mitigation | |------|--------|------------| | Score volatility – sudden spikes could push low‑quality content to the top. | User churn if feed feels “spammy”. | Apply a minimum quality filter (e.g., average rating ≥ 3.5) and a decay factor on the recency component. | | Cache staleness – if batch fails, feed may show outdated items. | Loss of real‑time relevance. | Fallback to the previous successful snapshot and surface a “Last updated X minutes ago” banner. | | Heavy personalization could hide truly global trends. | Users miss cultural moments. | Blend 70 % global score + 30 % personalization (tunable). | | Mobile data usage – loading many thumbnails. | Users on limited data may abandon. | Serve WebP/AVIF thumbnails, lazy‑load only visible cards, provide “Data‑Saver” toggle. | | Legal – showing copyrighted content without permission. | Compliance breach. | Only expose items already licensed on the platform; badge data sourced from internal analytics, not third‑party APIs. |

| Area | Requirement | |------|-------------| | Performance | Initial feed load < 800 ms on 4G, < 400 ms on Wi‑Fi. Subsequent pagination < 300 ms. | | Scalability | Engine must handle up to 10 M daily active items; use Redis sorted sets for fast ranking. | | Reliability | Feed generation fallback to last‑known good snapshot if a batch fails. | | Security | All API calls require OAuth2 Bearer token; rate‑limit: 60 req/min per user. | | Privacy | No PII is stored in the trending score. Users can opt‑out of personalization via Settings → “Personalized Trending”. | | Accessibility | Card content follows WCAG 2.1 AA – alt text for thumbnails, proper contrast, focus order. | | Internationalization | Badge text and UI strings support EN, ID, ES, FR; locale‑aware number formatting. |

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