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Promote yourself with a professional email signature [Browser Extensions, Tech]
last checked Jul 10, 2026 · HTTP 403
CohortClass of 2015What it is
Promote yourself with a professional email signature [Browser Extensions, Tech]
HTTP liveness
9 probes since Jun 16Jun 16Jul 10
AliveHard-dead (404/5xx/parked)RedirectedUnverified (timeout/DNS/block)
Observed events
probes · press · GitHub- Jul 10, 2026Probe inconclusiveUnknown
- Jun 16, 2026First probe — liveAlive · 200 OK
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Pulse Indexobserved activity
172/4 signal families
Liveness40%0.20
Press30%no data
GitHub20%no data
Tranco10%0.87
Weighted observed activity · updated Jul 15
Cohort survival · Class of 2015weekly
12,940 products launched in 2015 · 100% still active
12,899 active41 sunset
Still active
100%
Median lifespan
4.9y