Choosing the Right Platform for Print-on-Demand

You can start print on demand business on a lot of platforms such as Amazon, Etsy, eBay, Zazzle, Redbubble, etc. However, how do you choose the right platform? As someone deeply immersed in selling print-on-demand products, I avoid the platforms where there is upfront costs. Instead, I choose the platform that charges for manufacturing and shipping only when the product is sold. I avoid platform where I have to pay to list products.