Ever considered you are doing it wrong?
Of course they don't, because obviously it's
ALWAYS the game's/someone else's fault when a player can't win the grand prize with just a couple clicks...
Obviously I, along with plenty of other players who've managed, are just a bunch of filthy, dirty wallet whales cheating our way through the event with 1,000,000 diamonds, since that's of course, the
only way we've been able to run 8-9+ cities & clear out 11-13+ grand prizes!
It has absolutely nothing to do with perhaps, rubbing 3 brain cells together & trying/figuring out how to play a better/more efficient game.
*sigh*
And this is why we can't have nice things anymore.
Welcome to what happens when you raise entire generations of kids to believe that everyone gets a huge trophy just for showing up.