AI studies instantly full due to high demand and scripts

Participants are unable to reserve places in studies because they fill up instantly, even those with hundreds of spots. Many users report seeing "high demand" errors repeatedly until studies are full, and AI studies now often have only 20 places, making them nearly impossible to join. This has become a widespread issue affecting the ability to complete any studies.

Prolific MarketplaceUpdated 1h ago0.21

Pain score

0.21/ 1.00 · weighted product of four components

Reach0.73

distinct authors (log-normalized)

Recency1.00

freshness decay, half-life months

Engagement0.92

upvotes + comments, normalized

Monetization0.50

willingness-to-pay cues in evidence

§ Evidence — 2 verified quotes

Since yesterday it's impossible to get into studies, they are INSTANTLY full, even the 300 places ones.

Reddit·@PowerToThePeople128·Jul 10, 2026·source ↗

A study with 300 places and everytime I tried to reserve "high demand", maybe i tried to reserve about 20 times until it was full...wow

Reddit·@TheLimus·Jul 7, 2026·source ↗

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