“a deal with Ghislaine Maxwell that she would get some immunity now and maybe a hidden pardon in the future: some sort of implication that she would be pardoned in the future if she comes out and says that the president was… not involved in any criminal activity.”

There will be no need for a pardon in the future, as soon as she gives a list without Trump or his allies on it she’ll be found suicided the next day. Can’t risk her growing a conscience and telling a different story later.