It's actually part of the war victory message. "The war has been won by the Knights. You have been awarded perk points"
Of course you will only see the message if you are online at this very moment, but you will still get the perks when you are not. There's just no message about it.
As rare as that message is, it looks familiar.
But if you're on one of the two loosing sides, is it not included in your "victory" message? As I understand, you still get awarded some perks (a smaller, token amount) but then shouldn't you also see this message? IE: "The was has been won by the Bishop/Rooks. You have been awaded perk points." Or should, on my loosing end, just be seeing the "they won" message?
I remember last night, the rooks winning and not seeing the "perks awarded bit". Could be just because I DCed a couple times throughout the night and shortly relogged on before the victory.
And if I understand the last bit of your message, the server somehow awards me perks for my participation in a map victory, even if I'm offline and not logged in when the map is won/rotated? (no wonder the rooks/bish have so many perkies
)