Unless there is another amendment, the GSEs keep their earnings. UST can only updates their book to increase the loan balance.
Two persons, who owes someone $189k at 10% interest in 2008, had paid back already $310k in 10 years. Among the repayments, $60K was repaid in 2012. Yet his loan balance, instead of being paid down, is increased to $210k. What a joke ! A money shark or a US type of communism ?