There is the story in Dr. James Ketchum‘s memoir of a barrel containing 40lbs of LSD turning up in his offices. He worked on the Edgewood arsenal as part of the US military. This was enough LSD to make several hundred million people trip and worth nearly $1 billion at street value. Are you suggesting that Pickard manufactured more than that?
Where’s the demand for all that LSD. I can’t imagine more than 30 million people ever doing it and probably less than 2 million habitual users in the US.
The production of LSD was highly concentrated, the DEA claimed that after Pickford's arrest, availability dropped by 99.5%, it looks quite a while to recover. His supply basically was the entirety of demand at the time.