Nobody was buying anything. It was a money laundry. It was there to show a legitimate source for the wealth she was accumulating. Trouble is, even a cursory investigation showed it wasn’t engaged in any business activity - a pure front.
Similar to the Politicians who write books that are then purchased by Labor unions or leftist publishers. $10 million for a self biography for some washed up pol? More likely post-political payoff for previous favors and the expectation that some of the money will be expended on to further advance leftist causes. (How many homes does Barry the Manchurian have??)