{
  "description": "Privacy-safe robust statistics derived from reviewed aggregate outputs: YoY decomposition, multi-window CAGRs, seasonality, scan concentration, longevity, full-census geography, and measurement-maturity correlation.",
  "rows": [
    {
      "area": "trend",
      "caveat": "Aggregate hits; bot/prefetch methodology approved 2026-06-12. 2024 was an unusually high platform peak.",
      "id": "yoy-total-2024-2025",
      "interpretation": "Total dynamic scans fell from 100,470,117 in 2024 to 88,206,725 in 2025.",
      "value": "-12.2%"
    },
    {
      "area": "trend",
      "caveat": "Half-year split of aggregate hits (bot/prefetch methodology approved 2026-06-12); do not read H2 recovery as a guaranteed forward trend.",
      "id": "yoy-decomposition-h1-vs-h2",
      "interpretation": "The 2025 decline was front-loaded: first-half scans fell sharply year over year while second-half scans nearly matched 2024.",
      "value": "H1 -20.7% vs H2 -2.5%"
    },
    {
      "area": "trend",
      "caveat": "Single-quarter comparison of aggregate hits (bot/prefetch methodology approved 2026-06-12).",
      "id": "yoy-q4-recovery",
      "interpretation": "Q4 2025 scans rose year over year, the only quarter to grow, reinforcing a stabilisation rather than continued decline narrative.",
      "value": "10.6%"
    },
    {
      "area": "trend",
      "caveat": "Aggregate hits; endpoints sensitive to the 2024 peak and 2025 moderation.",
      "id": "cagr-2018-2025",
      "interpretation": "Compound annual scan growth 2018->2025 using 2018 as the mature pre-pandemic baseline.",
      "value": "16.1%"
    },
    {
      "area": "trend",
      "caveat": "Aggregate hits; endpoints sensitive to the 2024 peak and 2025 moderation.",
      "id": "cagr-2020-2025",
      "interpretation": "Compound annual scan growth 2020->2025 using 2020 as the first pandemic-acceleration year.",
      "value": "15.1%"
    },
    {
      "area": "trend",
      "caveat": "Aggregate hits; endpoints sensitive to the 2024 peak and 2025 moderation.",
      "id": "cagr-2021-2025",
      "interpretation": "Compound annual scan growth 2021->2025 using 2021 as the post-acceleration plateau start.",
      "value": "7.3%"
    },
    {
      "area": "seasonality",
      "caveat": "Two-year index; aggregate hits. Useful for report framing, not a robust long-run seasonal model.",
      "id": "seasonality-month-peak-trough",
      "interpretation": "Scan activity peaks in spring (April) and bottoms in mid-winter (January) on a day-length-normalized basis.",
      "value": "April 1.17 vs January 0.80"
    },
    {
      "area": "seasonality",
      "caveat": "Pooled over 24 months of aggregate hits; bot/prefetch methodology approved 2026-06-12.",
      "id": "seasonality-dayofweek",
      "interpretation": "Tuesday is the busiest scan day and Sunday the quietest, a clear workweek pattern.",
      "value": "Tuesday 1.10 vs Sunday 0.85"
    },
    {
      "area": "seasonality",
      "caveat": "Aggregate hits; weekend includes Saturday and Sunday only.",
      "id": "seasonality-weekday-lift",
      "interpretation": "Average weekday scan volume exceeds average weekend volume, consistent with workplace, retail, and B2B QR usage.",
      "value": "17.3%"
    },
    {
      "area": "concentration",
      "caveat": "HHI over active dynamic-code clients in the quarter, excluding internal accounts; not a market-share statistic.",
      "id": "concentration-hhi-q4-2025",
      "interpretation": "Scan activity is spread across dozens of effective clients; the platform is not dependent on a single customer.",
      "value": "HHI 0.01293 (~77.3 effective clients)"
    },
    {
      "area": "concentration",
      "caveat": "Quarterly windows (full-year times out); driven partly by individual breakout campaigns.",
      "id": "concentration-rising-2025",
      "interpretation": "Concentration rose across 2025: the effective number of clients fell and the top client's share grew from Q1 to Q4.",
      "value": "effective clients 107.2 -> 77.3"
    },
    {
      "area": "concentration",
      "caveat": "Shares only, no client identities. 2025-Q1 window; excludes internal accounts.",
      "id": "concentration-top100-share-q1",
      "interpretation": "The top 100 client accounts generated 61.0% of Q1 2025 scans (top 10 = 23.7%), out of 12751 active clients -- a strong head with a long tail.",
      "value": "61.0%"
    },
    {
      "area": "longevity",
      "caveat": "Single creation cohort; retention measured on active codes vs the first full month (month 1). Not Visualead-filtered (negligible).",
      "id": "longevity-retention-12-24m",
      "interpretation": "Of QR codes created in January 2024, about a quarter were still being actively scanned a year later and roughly one in five two years later.",
      "value": "26.0% at 12m, 19.7% at 24m"
    },
    {
      "area": "longevity",
      "caveat": "Interpolated from one monthly cohort; aggregate hits.",
      "id": "longevity-half-life",
      "interpretation": "Active-code half-life: it takes several months for half of a creation cohort's codes to stop generating scans, indicating durable engagement rather than one-off use.",
      "value": "~5.3 months"
    },
    {
      "area": "longevity",
      "caveat": "Scan volume is outlier-driven (a few breakout codes); read as directional, not precise. Active-code retention is the robust signal.",
      "id": "longevity-deployment-lag",
      "interpretation": "Cohort scan volume peaks a month or two after creation, consistent with a print-and-deploy lead time before codes go live in the field.",
      "value": "peak at month 2 (1.8x creation month)"
    },
    {
      "area": "geography",
      "caveat": "Full-year 2025 (101.9M geolocated scans, bi-weekly chunked extract); scan-level geography, not Visualead-filtered.",
      "id": "geo-top-country-share",
      "interpretation": "United States is the single largest scan market in full-year 2025, with the top 5 countries at 58.7% and the top 10 at 72.6%.",
      "value": "United States 36.3%"
    },
    {
      "area": "geography",
      "caveat": "Region mapping follows the report's editorial macro-region scheme, including transcontinental states; full-year 2025 window.",
      "id": "geo-region-leaders",
      "interpretation": "North America and Asia-Pacific are the two largest scan regions; 239 countries appear in the extract.",
      "value": "North America 38.7%, Asia-Pacific 28.2%"
    },
    {
      "area": "measurement",
      "caveat": "Different samples: creation-weighted is the Q1 2025 100k external sample; scan-weighted is the top 1,000 January 2025 links. Deterministic classifier v0; association, not proven causation.",
      "id": "campaign-tagging-scan-lift",
      "interpretation": "Destinations that carry campaign-tracking parameters are over-represented among high-scan links, so the codes marketers instrument with tracking tend to be the ones that get scanned most.",
      "value": "3.2x (3.9% -> 12.5%)"
    }
  ],
  "source": "Derived from outputs/reviewed and outputs/public aggregate CSVs; no raw URLs or customer identities.",
  "title": "Report-ready additional analytical findings"
}