ND posted something new regarding the Double XP events. They're happening all April Weekends. (4 times)
It says nothing about a Rare treasure drop event though.
2 player London Underground on crushing in 9m45s
Do people really level up this slowly that they need double XP this much?
People play the game a lot less than you do. Also, lots of very new people would like to level up... it's not just your game.