oneworld member air berlin filed for bankruptcy two weeks ago after Etihad withdrew its support. The German government extended a loan guarantee (subsidy) to keep the airline flying while a sale of assets was arranged. The airline has cumulatively lost several billion dollars.
The airline’s topbonus frequent flyer program has filed for bankruptcy as well. They’re no longer offering earning or redemption. They no longer had the possibility of being repaid debt owed by the airline, or collecting funds from airline mileage accrual.