I was playing about with LP on a rooted device and I found after a while of buying Golden Eggs it would come up with a transaction error and I couldn't buy any more. Most I got to was about 5 million Golden Eggs before it stopped.
Then I found if you go on the screen where you buy the eggs and dword group search the amount of Golden Eggs you receive per purchase (2000;4400;10000) it bought up just three results. Change one to whatever amount (I did 1,999,999,999) and purchase. I then had 2 billion Golden Eggs.
I've played for a while and no ban has come up so far.