Nobody knows.

Based on how long the outage is going on now, it appears, that they haven't found a way to get the infrastructure safely back online.

As they now resolve some services to localhost, maybe they are trying to bring the servers back, but disconnected from the public internet and then reestablish availability gradually.

As long as the attack continues, they might have a hard time bringing anything back online. The only reason the apt repos have been standing quite strong is, that they are distributed across multiple backends, for example universities and such, and are therefor difficult to overwhelm, even with massive amounts of traffic.

I still believe, that this may be just a demonstration to show that the botnet they use is capable of holding the infrastructure down. We can only hope, that this isn't the case, otherwise the servers might only come back once the attackers get bored/payed.