Vicki Shotbolt has initiated a lawsuit against Valve, seeking £656 million for alleged abuse of market dominance related to its Steam platform. The lawsuit claims that Valve restricts game sales on Steam, preventing developers from using alternative distribution channels, and enforces anti-steering provisions that limit in-game purchases to those who buy the base game through Steam. Shotbolt also argues that Valve's commission structure, which typically retains a 30% cut of revenue, is excessively high compared to the value provided. Valve's commission rates decrease for higher sales volumes, but the standard 30% aligns with industry norms, while the Epic Games Store charges a lower rate of 12%. Despite the lawsuit, Valve's Steam platform remains highly profitable, generating significant revenue per employee.