DS - Allow assigning discount campaigns directly to multiple collections despite Shopify API limitations

Due to a current Shopify API limitation, automatic (smart) collections sometimes fail to apply discounts properly, requiring manual product tagging as a workaround. This manual tagging process is tedious, especially when managing multiple collections and frequent sales. I'd like Discounty to implement functionality that allows us to easily assign discounts to multiple collections simultaneously, overcoming the Shopify API limitation and streamlining campaign management.