Stack Overflow

Trash Stage 4

Stack Overflow was reference infrastructure for working devs, built by its community. It sold that corpus to AI companies and banned users who deleted their answers in protest. The community has collapsed—monthly questions are down about 99% from the 2014 peak, as chatbots trained on the archive replace it. Extraction plus decline: stage 4.

Since
2008
Category
Reference
VC-backed
Yes
Public
No
Acquired by
Prosus (2021)
Website
stackoverflow.com
X
@StackOverflow

The promise

Its first promise, and how much is kept · Scoring

30% kept

“Stack Overflow is a programming Q & A site that’s free. Free to ask questions, free to answer questions, free to read”
Stack Overflow about page, 2010 1 extraction criterion and 2 decline criteria met.

Why it’s rated 4

The criteria it meets, with sources · Method

Alignment 0 of 3
None
Lock-in 1 of 4
  • L1 Network or reputation
Extraction 1 of 7
Decline 2 of 3

Result Extraction that meets the stage 3 test, plus at least one decline criterion, so stage 4.

Rating history

Oct 6, 2026
Downgraded 3 Ripping you off → 4 Trash

Rescored under Method 2.1. Stage 3 test met by lock-in (L1 Network or reputation) plus a documented extraction criterion (E5 Data grab), plus decline (D1 Users leaving, D2 Suppliers leaving).

News signals

Sourced reporting, tagged by strategy

Aug 8, 2026
Stack Overflow logs 1,442 questions in July, down 99% from its 2014 peak
May 9, 2024
Stack Overflow bans users who deleted answers to protest its OpenAI data deal
Data enclosureCreator squeeze
Jun 2, 2021
Prosus agrees to buy Stack Overflow for $1.8 billion
Market consolidation
Jun 2, 2021
Stack Overflow CEO: acquisition will accelerate Teams and platform reach
Ecosystem lock-inEnterprise upsell