The minimum gap between promotions editing channels is the number of days between promotions for the same sponsor to prevent them from booking multiple days in a row. So, if you only want to promote the same sponsor once a week, then you must insert a 6 minimum gap between promotions.
Please note that the minimum gap between promotions excludes any unavailable dates. That means that if you make every Sunday unavailable, then you must insert a 5 minimum gap between promotions if you only want to promote the same sponsor once a week.
Below is an example when setting the minimum gap between promotions as 1, where there is at least one day between promotions from the same sponsor.
