That weird fork the second from the right was from when Google was aspiring to become a bank... or at least partner with one, to offer credit cards.
The far right branch is the "Next Billion Users" stream that launched Tez, which at the time was explicitly and solely for the Indian market, but since it was superior to the Google Wallet/Pay at the time, the VP lead decided to aim for global adoption, which was the previous Pay-->Wallet-->Pay nonsense a couple years ago. That has failed, so now everything is reverting back to the original/primary branch on the far left, which is and has always been, owned by the Android team.