The connections and rumors thing...they have sources...but recall that Hammond dropped something about the Patrick O'Sullivan trade early and got busted. Do not recall the particulars.
I am sure if Hoven or DB know anything, they are sworn to withhold info. And also, there may be certain trade talks that they could know something about and just drop there are rumors, without divulging anything. And some trade talks are over a period of months. Blake mentioned the Muzzin deal was over a period of time and when he felt good about the changes in the deal / players, he pulled the trigger. Now someone like Friedman may be able to drop more accurate stuff, as he has no ties to the organization, whereas if Hoven or DB leak, they lose their ties to the Kings.