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Xero Gravity: SEO & The Network Effect
Rand Fishkin from Moz
last checked Jul 16, 2026 · Timeout
CohortClass of 2016What it is
Rand Fishkin from Moz.com drops by w/ SEO knowledge bombs. [SEO]
HTTP liveness
10 probes since Jun 16Jun 16Jul 16
AliveHard-dead (404/5xx/parked)RedirectedUnverified (timeout/DNS/block)
Observed events
probes · press · GitHub- Jul 4, 2026Probe inconclusiveTimeout
- Jun 16, 2026First probe — downDead · 404
Moat
Network effects
weak
SEO knowledge bombs
weak · 0.80 confidence
Text classification · Jun 2026
Discussion 0 comments
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Pulse Indexobserved activity
10 probes0 pressGitHub –Tranco –
Not enough observed signals for a Pulse Index (needs 2+ signal families).
Cohort survival · Class of 2016weekly
13,657 products launched in 2016 · 100% still active
13,633 active24 sunset
Still active
100%
Median lifespan
4.9y