What is up with Softbank? It seems to be throwing a lot of its money into overvalued late stage funding rounds for companies that don't really have growth potential left in them.
Hypothesis: they have been given more money than they have good investment targets for, among others by Saudi Arabia after they postponed the Aramco IPO. They had to invest that money somewhere, so they gave companies like Uber and WeWork 10x what their most generous investment should have been.
Disclaimer: I don't have any inside or expert knowledge about Saudi Arabia or Softbank. But they seem to have been stuffing billions of dollars into companies that can pretend to be "tech", but aren't really.