You should keep in mind that only one provider allowed end users to pay spot rate and ERCOT revoked their license to operate after the freeze where power rates went to $4000/MWh. The average Texan (excluding people in East Texas who are on the Eastern power grid, and people in Austin) buy their energy on a 12 month contract from an intermediary who THEN negotiates a flat rate or gambles on beating the sold contracts on spot.