Could they be extending this to get Trump with his overwhelming win in the next election. They then claim that he had external help to claim victory. Their tangled corrupt web stretches far and wide. Just a thought from a casual observer.
There's also this helpful info from the CDC
It would be funny for some bank or financier to back the $500M sum and then say that they did it because they know, by his track record, that he's good for it.