: Researchers purchased engagement from commercial providers to see if platforms would remove the fake interactions.

This 2022 research (updated in 2026) published in ScienceDirect and ResearchGate provides an economic breakdown of the SMM (Social Media Marketing) panel ecosystem.

3. Sociological Perspective: "The Impact of Social Endorsement Cues"

This 2024–2025 experiment by the NATO Strategic Communications Centre of Excellence tested how easily major platforms could be manipulated.

A study in Cyberpsychology, Behavior, and Social Networking explores why people are influenced by these numbers regardless of their authenticity. An analysis of fake social media engagement services

1. Market Analysis: "An Analysis of Fake Social Media Engagement Services"

: While some platforms like X (formerly Twitter) removed up to 50% of fake accounts, others like TikTok removed as little as 3%. This highlights why users continue to buy likes: the risk of immediate removal is often low, though long-term reach may drop by up to 60% due to "shadowban" effects.

While there isn't one single "most famous" paper, several recent academic studies provide a deep dive into the underground market and psychological impact of purchasing fake engagement on Instagram.