Whoa, I started hacking after the christmas event. I chose "I'm Nice", and no dummy hat.
Anyway today Kefir updates again to 1.7.1.
It seems raider event will be harder
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added 2 minutes later
I only have 100k coins. no hat.
Raider event reset every 24 hours after you logged in to the game.
As update 1.7.1, it seems the wait is longer. maybe 48 hour, because I'm not seeing theses raider now.