How can I give my subscribers (members) a discount on all products in my shop? Like a membership model with a storewide discount.
To give your subscribers a discount on all products in your shop, you just have to turn on the option to tag all active subscribers in Seal Subscriptions app. You can turn this on in Seal Subscriptions -> General Settings -> Customers.Then, you can use the Bundler - Product Bundles app (https://apps.shopify.com/bundler-product-bundles) to create a volume discount bundle, which you set to apply on all products in your shop, whenever a customer buys at least 1 product and you limit it to the customers tagged with "seal_active_subscriber" tag.