Well you haven't read much that's obvious. The fight was the basis for Hemingway's classic short novel," Fifty Grand!"
Yes, it was a "fake" fight as revealed by Benny Leonard's trainer Mannie Seeman, who told of this many years later after Billy Gibson, Leonard's manager and Benny Leonard, were dead. Seeman was in Leonard's dressing room just before the bout and gravely said to Leonard words to the effect. Benny you cannot win tonight ". the shocked Leonard wept upon hearing this but had to go along, and though beating the bigger Jack Britton and dropping Britton in the 13th round, ran to the fallen Britton and clouted him on the side of the head, prompting the referee to disqualify Benny Leonard promptly...The audience was shocked as Benny Leonard was a cool customer and never lost his temper before...Those days in the roaring twenties you could easily lose your life, disobeying the mob...
Correction please : I meant Billy Gibson, Leonard's manager SAID to Leonard' "Benny you cannot win tonight". Mannie Seamon revealed this after Leonard died in 1947, while suffering a fatal heart attack refereeing bouts as St.Nick's Arena...