I think I mentioned this before, my daughter was working for a huge real estate company in NYC, and they had a "mandatory" meeting where Hillary was to give a speech. This was circa 2014. No doubt Hillary was paid whatever for said speech, which I presume would be a stock speech where she changes a few specifics.
My daughter couldn't recall anything from the speech when I asked her, she paid little or no attention, which is fine. The next morning they all had a copy of Hillary's latest book on their desks. She told me most folks immediately dumped it in the trash (including her). But Hillary booked a few thousand additional sales, probably at full cost.
I read that the basic function of the "Clinton Foundation" was to retain employees who would later be used to staff her campaign. They got paid for being part of the CF, and thus didn't wonder off into the hinterlands, thus giving Hillary a group of campaign staffers she had already vetted. So, they were kept together. And of course myriad companies expecting Hillary to be the next President made "generous" donations to the CF (which fell markedly when she lost). It's a way to buy influence, entirely legal, corrupt in my mind, but legal. I thought the CF was brilliant, tactically, though corrupt. I presume they did fund some beneficial projects somewhere, maybe. They were awash in money for a time.