According to Odaily Planet Daily, Seraphim Czecker, head of growth at Ethena Labs, posted on the X platform that he is the co-founder of OnlyFans. He said that he had been implementing the OnlyFans project before Leonid Radvinsky became a major shareholder.

Czecker said Radvinsky's unique skill set of vision, deep knowledge of webcamming, and passion for empowering adult creators made him the perfect fit. After the launch, development was slow, and Czecker once created random model profiles to create false interest.

He left the program in March 2019 and said the experience had a mixed impact, good and bad, and changed his life.