High-traffic applications produce more events than most teams can store or interpret without discipline. Property cardinality and client-side retries often matter more than the tool logo on the invoice.
Agree early on which events must be exact and which may be sampled. Activation and billing paths usually need full fidelity; scroll-depth vanity rarely does.
Plan for evening peaks when validating pipelines — daytime spot checks miss the shape of real load for many consumer products in Korea and nearby markets.