Who pays for ERCOT?

Can you elaborate on who ultimately bears the financial responsibility for ERCOT, the Electric Reliability Council of Texas? Is it solely the responsibility of the electric utilities within the state, or do consumers also contribute through their electricity bills? Are there any subsidies or funding mechanisms in place to support ERCOT's operations, or does it rely primarily on market-based mechanisms to ensure reliability and efficiency in Texas's power grid? Understanding the financial dynamics of ERCOT is crucial for assessing its impact on the state's energy landscape and the broader economy.