Would a new project idea that's similar to Teespring.com be successful?

Hello, I want to start project that is going to be similar to Teespring.com. The main difference that the products will be printed using digital prints, so every order could be fulfilled on demand - next day. Here are the main differences of my project comparing to Teespring model: 1: No campaign time limit (users can buy products for as long as they want) 2: All Products dispatched next day of purchase. Meaning users won't have to wait till campaign ends. 3: There could be 3 different designs (now you can have only 1 design on Teespring) 4: More products including mugs, pillows, T-shirts, hoodies. 5: Campaign creators could buy graphic designs from us and then use them for their campaign. Thank you for your…