For me, the best rewards were in the first few days in terms of the amount of chests, but I still haven't gotten anything out of the ordinary.
I'm on silver so my chest doesn't have so many benefits, in the first 2 days I managed to make 15 chests and in the others between 10 and 12 and even then only your last day should pay for all my days..lol
Thanks for sharing.
!1UP