Free period

Each group has a graphical display (“Runtime” button) that works in a similar way to the fill level in a grain silo.
The grain silo is naturally full at the start of the group, as the group functions completely free of charge for 30 days.
The fill level of the silo is reduced slightly with each calendar day.
As long as the silo is not empty, the group functions without restrictions.
Each payment of a contribution automatically refills the “silo” for all group members.