50,000 shoppers — why the largest database is not automatically the best KPI
Why mystery-shopping agencies should look at regional density, freshness and responsiveness rather than raw panel size alone.
Total size rarely answers the concrete recruiting question
For a need in one city, a large national total is of limited value if only a few current and reachable shoppers cover that area. The practical question is how many relevant, reachable and current profiles exist there.
Historic records can inflate the headline number
A panel can grow for years while some profiles stop responding or move away. Without freshness signals, a large total is difficult to interpret.
Usable density is closer to real value
Regional coverage, realistic working radii, activity and response signals are often closer to recruiting value than the total number of registered people.
A better KPI is a bundle of signals
Rather than optimising one impressive headline number, panel quality, regional density, freshness, response and confirmed availability should be considered together.
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