Well thats a bit different as it was unplanned interruption of service.
They didn't lose power, they had backups, they chose to shut them off because it would have been inappropriate for them to keep them running when there were power shortages. I don't see it as being different. THe game was offline for an extended period, thus they compensated people. I don't think they would not do so if the game was down for a similar period of time again. (However, it's probably not going to be that long).

Also, your free period start and end dates will almost certainly be based on when your subscription is set to end (may be part of why the 90 day plan was removed).

As far as money as concerned, SE has been very reasonable in reference to this game and they have been making smart moves in that department. I have no doubt they will handle this acceptably.