An example of a "poor" CEO fronting for richer people is J P Morgan who controlled a lot of assets and drove world finance 110 years ago, but he didn't own all that much. Not sure we know whom he was fronting for.
So this is why Feinstein released the testimony that the Dossier is not fake. Not sure what the legal standard is here, but testimony under oath that it's not fake will help in any defense. Probably a total lie of course.
There were two exaggerated drinks. I don't remember the first too well. The second, he was wearing a purple tie and drank the water with both hands. That meant he was going to consume them, and he was wearing purple to mean the purple color revolution people e.g. Soros.
As noted, while they're married they cannot be forced to testify against each other. That's become important enough for Huma to stay married, apparently.