A flat per-minute cap treats a flash-sale checkout surge the same as a runaway script. Partners in Thailand’s retail calendar feel that difference immediately.
Look at 429 timing against known events. If blocks cluster around promotions rather than idle nights, your limit shape—not your clients—may be the problem.
Consider burst tokens, soft warnings, and client-class tiers before a global tighten. Document the rationale so support teams can explain decisions without improvising.
Revisit quotas after each major client onboarding. Yesterday’s fair limit is tomorrow’s silent revenue leak.