Why US gives billions in aid to Jordanian regime

According to the Times it is for the refugee crisis: "Maintaining stability in Jordan is a top American priority in the region and the United States is providing $1.6 billion this year to help it cope with the crisis". Excuse me but Lebanon has also accommodated 1.2 million Syrian refugee and never got anything  near that figure from the US. Did you forget the payback for peace agreement with Israeli occupation state?