Author: Rustam Sharipov Affiliation: Independent Researcher Received 1 July 2025; Revised 18 August 2025; Accepted 27 August 2025; Available online 10 September 2025; Version of Record 10 September 2025. Abstract This article offers a critical sociological analysis of Tumblr’s dramatic valuation trajectory—from Yahoo’s approximately US $1.1 billion acquisition in 2013 to its sale for a price widely reported as under US $3 million in 2019. Going beyond surface narratives of