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The Brain Audit:

The Brain Audit:

Why Customers Buy (and Why They Don't) [Tech, Books]

Education·Launched Oct 2016·0 upvotes·amazon.com

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ALIVEverified Jul 14, 2026 · HTTP 200

CohortClass of 2016

What it is

Why Customers Buy (and Why They Don't) [Tech, Books]

HTTP liveness

19 probes since May 26

May 26Jul 14

AliveHard-dead (404/5xx/parked)RedirectedUnverified (timeout/DNS/block)

Observed events

probes · press · GitHub

May 26, 2026
First probe — live
Alive · 200 OK

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Press

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Tags

paid only marketers creators researchers code

Pulse Indexobserved activity

19 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