Not sure if this problem is fixed, but Reddit requires each day of the campaign to have the same numbner of impressions. So if monday has 100 impressions avail

Not sure if this problem is fixed, but Reddit requires each day of the campaign to have the same numbner of impressions. So if monday has 100 impressions available, tuesday has 100 impressions available, but wednesday has only 1 impression available... then a Monday-Tuesday-Wednesday campaign can only be for 3 impressions. A shorter campaign (Monday-Tuesday) will give you access to 200 impressions. The "0 impression" number in your post might be because one day out of that huge timeframe is completely bought out.