For all you whiners that wanted GravBall to be back, the Free Infantry admins have put it in rotation. Want to keep it up? Play.(Free) Infantry Online
EDIT: March 28, 2018: Not enough played. It was taken back down. (w0rtez and n0ferz did though)
EDIT: April 9, 2018: One of the Free Infantry admins kindly put it back up last week. Players played. I believe there was even a YouTube recording of it made.
EDIT: GB is now in "request rotation" meaning it only goes up when it's requested.