User blog comment:Tricoro/In Memoriam of Cookie Run Newsletter.../@comment-33658145-20160409001730/@comment-27958293-20160502044312

I think they just reuse the old newsletter for events like Burning Time, Wednesday Boost Day, etc. Those kind of events indeed have newsletter that can be reuse again and again, while one-time events that come during/after the events like Collect Water Drops don't.