Poor marketing tools

So I noticed that spreadshirt does not provide any space for email listing, which by far is a very essential tool in marketing. If I have a customer who would love to know more about my product, or get newsletters or updates on current designs I have, it becomes a problem, because I can’t get access to the customer info. Now if I want to tell people about new products I have to message them personally. If I am to see to a large audience of about 5k how effective will it be to reach out to them without having their info. Well this suggestion will as well benefit spreadshirt because we would have to look for the customers and keep them as well, and the more customers we are able to keep the more spreadshirt is able to grow. Shopify should be a case study.