> I can hardly believe that this is legal. They’re basically committing money that doesn’t exist just yet.

What do you mean "just yet" :-)

I don't really know how likely it is that the money being committed will actually exist when the time comes (Softbank's commitment didn't exist, they had to sell off assets and rope in other investors to meet their commitments).

Maybe it is very likely to exist, but, really, who knows?

IOW, your statement would be equally true by ending the sentence at the word "exist".