For every missing member on each team, the other team is provided with 7 flame points. This also applies to members that leaves the team. For every member that leaves the team, the other side will receive 7 flame points. However, if that member has already been attacked, the 7 flame points will not be added as it is already on the full count.
Another thing to point out is that if a member has already contributed and then left the team, it is intended that their contribution will stay on that team.