Are you guys getting keys from that box you get from leveling ? Last event it was a very high probability to get key , i got in about all of them but now i cant get keys anymore from that boxes . Did they decreased the probability for the key?
I get them not from the boxes but at the same time. Seems to be about a 50% chance. Look at the bottom left of your screen when you get a cashe and see if one pops up with the box.