promo day
Tag: promo day
1 posts tagged "promo day".
Fri Apr 24 2026 08:00:00 GMT+0800 (中国标准时间)
Case · An online-edu promo day with 50× traffic — engineering notes
A coding-education company handled 120k conversations in 24 hours during 618 sale, AI deflection 81%. How engineering pre-tested, rate-limited, degraded gracefully.