Partial Credit is where users are rewarded even if they did not get every selection correct. Users get 10% of their entry fee back in Vivid Bucks for each correct selection on an entry that would not have otherwise won (cash entries only).
Example:
If you place a $10 cash entry and get 1 out of 5 players correct, you receive $1 back in Vivid Bucks (and $2 for 2 out of 5 correct, etc.).