I think the Clinton Foundation did not make the list due to the way the list was structured. The list authors chose to focus on how much of the donated money went to paid solicitors.
I looked it up. The Clinton Foundation spends very little money on solicitation. And that’s to be expected. When you are selling influence, you usually don’t have to contact to the mark. The mark contacts you.
You’re right, I failed to consider that Clinton’s influence peddling was far more seductive to donors.