For me the most interesting in this case is why nobody else wasn't interested enough, 1.3B is not that much of a money for other possible acquiree candidates to withdraw.
Facebook wanted to pull the Waze development center from Israel to the Valley. Waze's founder rejected this and demanded that the development will stay in Israel. This is why the deal with Facebook failed.
The deal with Google supposedly has a clause that for the next 3 years, Waze development will stay in Israel.
