curl HEAD/GET с браузърски UA към всеки URL в sources frontmatter на 51 поста.
Кодовете: 200 OK · 404 мъртъв · 403 WAF-блокиран (вероятно жив) · 302 redirect · 000 timeout/DNS (вкл. WordStream блокиран от нашата мрежа — страниците може да са живи).
| Пост | Мъртви | URL-и |
|---|---|---|
| attribution-models-explained | 11 | seresa.io, 1clickreport, weltpixel, leadsources, factors.ai, digitalapplied, theparadigmshift.io(000), andavadigital, stella.ai(000), triplewhale, koehn.ai + whitehatseo(403), proanalytics(000) |
| customer-acquisition-cost-guide | 4 | hubspot CAC, profitwell CAC, bain retention, deloitte digital-acquisition |
| marketing-kpis-every-marketer-should-track | 4 | hubspot KPIs, google analytics 9044134, cxl metrics-vs-kpis, deloitte measurement |
| mastering-ltv-cpa-ratio | 3 | cxl ltv-to-cpa, profitwell ltv-cac, hbr 2021 |
| guide-roas-vs-roi-guide | 4 | support.google 1704432, shopify roas-vs-roi, hubspot roi, investopedia ras |
| ab-testing-statistical-significance-guide | 3+1 фалшив | exp-platform bayesian PDF, arxiv.org/abs/2606.00000 (изфабрикуван ID!), doi.org(403), careersatdoordash(403) |