เห็นฝรั่งเค้าบอกแบบนี้นะครับ
Teespring is great for shirts that have a shot at going viral. SunFrog is a great place to move shirts to once they've been through a Teespring campaign or two so you can continue to pick up sales. I don't have much experience with Zazzle or Spreadshirt.
One thing Teespring does well is once you start to send a bunch of traffic to a shirt, they retarget that traffic on both Facebook and Google, so the people that clicked on your shirt will see it again. I pick up a lot of extra sales thanks to Teespring's retargeting ads.
You can make more money with teespring if you run fb right. If you check sun frogs facebook a lot of people complain about the quality of the shirt and late shipments.