Robert Johnson was terrible! People thought so, and he wanted to change that and quickly! So he traveled to northern Mississippi from Hazlehurst where he was told he could make strike a deal from the low-low price of his soul to become the greatest there was at the time. I believe that Elvis Presley did the same thing.
Why?
Because he and Robert Johnson died on the same date.

Lastly, Bob Dylan admitted in an interview with Ed Bradley that he made a deal to get where he is with the Chief Commander of The World, and the one that we cannot see.