DOT curator getting paid $16000 monthly and dumping his rewards

Why is this curator getting paid 4,000 DOT ($16,000) per month? Why does he keep selling all his rewards?

https://polkadot.subscan.io/transfer?address=13RBN6UF43sxkxUrd2H4QSJccvLNGr6HY4v3mN2WtW59WaNk&token_category=native&token_category=treasury