Is there a fee for connecting a store to the Dropshirt platform?

It is and will always be free to set up an account with Dropshirt. Actually, you only have to pay for something (i.e. a product and its associated shipping cost) when you make a sale on your own store, or if you order a sample from us. All orders can be paid for in the 'Orders' section of your account in the Dropshirt platform (coming soon!)