If you aren't joking then all alternative explanations for the utterance of such nonsense are extremely unflattering.
When I questioned the $10 billion pledge, I was not joking. A lot of creative accounting likely went to this figure. Do you have a list of who pledged how much?
It would be interesting (if there was such a list) to see SGI contribution. SGI can probably say that most of their expenses were part of their contribution.