I honestly don't think there is any beans to spill. They are all in on the crap etc.
Zuma , Ace ... they would have spilled the beans long time ago if they had some.
It's pretty simple. Jacob is the dumb tnuc who sold the country to the Gupta's, and didn't get anything in return (he was planning on a constant supply of money from them, but then the Gupta leaks came along and he was fuarked).
Ace - a very strong-willed individual who thinks he is untouchable. Hence him willing to try and rupture the ANC to save himself.