SELECT AVG(FEE) FROM (
SELECT SENDER, COUNT(TX_ID) AS TRANSACTIONS, SUM(FEE) AS FEE FROM(
SELECT BLOCK_TIMESTAMP, TX_ID, SENDER, FEE FROM flipside_prod_db.algorand.transactions WHERE BLOCK_TIMESTAMP > '2022-01-01' ORDER BY 1 DESC
)
WHERE FEE IS NOT NULL
GROUP BY SENDER
)