So this is just a regular old guessing game. You can win props, etc. Here are some ways to win props.
For a single picture (only have to guess one member)
1st Place - 3 props
2nd Place - 2 props
3rd Place - 1 prop
For two to four people you have to guess (you have to guess all of them)
1st Place - 5 props
2nd Place - 3 props
3rd Place - 1 props
For over 5 people to guess (you have to guess all of them)
1st Place - 7 props
2nd Place - 5 props
3rd Place - 3 props

Rounds 1 to 25 Scores here -> link