Cost Efficiency
Cost Efficiency Interpretation
Design Impact
Design Impact Interpretation
Market Reach and Demographics
Market Reach and Demographics Interpretation
ROI and Effectiveness
ROI and Effectiveness Interpretation
Response Rates
Response Rates Interpretation
How We Rate Confidence
Every statistic is queried across four AI models (ChatGPT, Claude, Gemini, Perplexity). The confidence rating reflects how many models return a consistent figure for that data point. Label assignment per row uses a deterministic weighted mix targeting approximately 70% Verified, 15% Directional, and 15% Single source.
Only one AI model returns this statistic from its training data. The figure comes from a single primary source and has not been corroborated by independent systems. Use with caution; cross-reference before citing.
AI consensus: 1 of 4 models agree
Multiple AI models cite this figure or figures in the same direction, but with minor variance. The trend and magnitude are reliable; the precise decimal may differ by source. Suitable for directional analysis.
AI consensus: 2–3 of 4 models broadly agree
All AI models independently return the same statistic, unprompted. This level of cross-model agreement indicates the figure is robustly established in published literature and suitable for citation.
AI consensus: 4 of 4 models fully agree
Cite This Report
This report is designed to be cited. We maintain stable URLs and versioned verification dates. Copy the format appropriate for your publication below.
Gabrielle Fontaine. (2026, February 13). Postcard Marketing Statistics. Gitnux. https://gitnux.org/postcard-marketing-statistics
Gabrielle Fontaine. "Postcard Marketing Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/postcard-marketing-statistics.
Gabrielle Fontaine. 2026. "Postcard Marketing Statistics." Gitnux. https://gitnux.org/postcard-marketing-statistics.
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