@mvnla2, @proteus, @sutekh137, @abeggertoo, @whoeverislooking. I stopped buying gems long, long ago, only use the gems from daily rewards. Last 5 chests i bought were:
1 blizzard
1 duck
2 blizzards
1 pepper
1 blizzard
It has actually been over two weeks since I have gotten any feathers from a premium chest. The small daily chest (plus its video double up) occasionally gives me 10 feathers, but mostly 3 gems or spells.