What caused Vistra's revenue cost drop in Q2 2023?

Vistra's revenue and cost dynamics in Q2 2023 are as follows:

The decrease in net income despite a significant increase in revenue can be attributed to the substantial rise in total expenses. This indicates that the company faced increased costs that offset the growth in revenue, resulting in a lower net income. Further analysis of the expense categories is required to understand the specific factors contributing to this increase in costs.