The fact that every search, export, and page access is logged, and that the Sanders people knew everything they did would be traceable, do you think they really would have tried to hoover up a bunch of Clinton data? The VAN CEO is emphatic that none of the exposed data was ever exportable.
My read on this is that very few people involved in the conversation have a very good understanding of technology and gp's speculation matches my own understanding.
That is pure conjecture and I'm not even sure the Sanders campaign would agree with you considering they have fired a staffer over this.