Where one focuses his/her attention and resources is a personal decision. I'm afraid I can't tell you Mr. Hoover's criteria for getting invovled in a particular company, or his decision not to enter Gold Bullion Development. I can tell you this with absolute certainty, the man has a million Jr.s on his radar at any given time and is constantly engaged in DD to find his next play.

Send him a PM if you're truly interested in the answer. He is generally quite transparent.