What is the minimum payout here?

Friend ground report pay you on monthly earning basic. So there is no minimum payout here. Even if you only earned .50$ (50 cent) in whole month then sent that amount in your paypal account every month.

And earning will be depends on the number of views you getting on your published articles or posts.

Have a look on some Top Earners of Ground Report.
Name: Can Tran
Member Since: April 2007
Location: Florida
Rating:
# of Articles: 947
Earnings: $482.96

Name: Al Jeratso
Member Since: April 2007
Location: Philippines
Rating:
# of Articles: 260
Earnings: $315.57