I think they were paid about $1.3 million. To me, the amount is surprisingly low given how much money Ghosn has, and the risk and effort involved.
Also I find it strange that the names of these 2 guys were known to everyone in the world immediately after Ghosn escaped.
I don’t think they thought they were at risk and weren’t planning on returning to Japan. I would take 1.3 million in return for never visiting a foreign country again.