So it has come to my attention that the new money building (AMR) has started affecting the amount of cash you receive from purchasing a vault.
The amount used to be 120*IPH. Now it varies quite a bit and the only common denominator I have found is the AMR.
One account doesn't have the AMR and still receives the 120*IPH
One account has 2- lvl 1 AMR's and receives 112*IPH
One account has 1- lvl 2 AMR and 1- lvl 1 AMR and receives 109 * IPH.
I would suggest everyone checking their values before making a purchase. I have discussed this with several different people and this is a common theme.