Set up a measurable pilot
Choose one primary metric from the plan, then track placement exposure, opens, action starts, verified completions and net revenue per eligible user. Randomize eligible users into a control and one variant, and compare the same full window. Choose sample size and duration from your traffic and detectable effect.
Protect the rest of the experience
Track retention, IAP contribution, support contacts, reversals and reward cost. Stop for broken attribution or a material guardrail breach. Validate the empty state, interrupted sessions and duplicate callbacks before exposing the placement to users.