Discount Master ‑ Quantity

Hi!
I searched a lot for an app for discounted variants and collections. It's good for this matter. The app would be more efficient if a campaign could be duplicated, or could be modified once it's active (if you mistake something you can only delete it which is frustrating if you discounted manually some variants of products). For an app of 14.99 dollars/month this features should be mandatory. It would be nice if the discounted products could be organized in a Collection (SALES for example). I manually add discounted products in a Collection named Sales and when you have hundreds of products it's not very efficient to add/remove manually products in/from a Collection. Hope to see improvements soon.