Many of them went into the labor unions.
(Common belief, but I am unable to quote statistics)

Most bootleggers I knew, in the dry days in Oklahoma, were good church-going citizens, who performed a service appreciated by all who liked their dram. I had one as a next-door neighbor.

A childhood memory, from the Prohibition 1930s before repeal, I remember them delivering Canadian goodies (this was in New Mexico, a long way from the border). Hell, the Elks Club would have been dead without their regular deliveries. Canadian Club was the big seller. At home, a dead Victrola (horn behind the gauze removed) was the storage cabinet.