Oh, and fwiw, "fair" compensation could be as simple as removing the energy cap until 12 hours or so after the server is back up. Thereby nobody would have wasted any energy by their inability to log in whenever, and people that were at low energy when the servers went down won't be at an advantage vs. those that weren't.

(Simply extending the event would be unfair. Folks like me who had pretty much no energy left would be significantly advantaged vs. those who were full/about to login. While the current lack of a PvP mode makes that unfairness currently irrelevant, that won't always be the case. Similarly, giving everybody "X" energy would be unfair.)