The first account I played in gave me monsters in golden egg through cracking an egg from a tree…
Then I created another account in my other device and voila, the golden egg is through a roullette…
.
Why is that???
The wheel is the usual way to get mons. Some people get the tree but I never had an egg from the tree and I’ve started playing in February. I wouldn’t mind knowing the difference between the two and how to trigger it.
In my android account that’s less than a month old, I’ve got the tree animation for every hatch, which is kinda boring 'cause I love trying to guess where the wheel is going to land as well as creating all kinds of theories about how it works 
same happen to me always hacths at the tree not the wheel type, any one know why, all my monsters got it from the tree type.
Oh… Its kinda unfair … The wheel is more user-manipulated than the tree!!