@Hannahdouken has outsmarted the t-shirt bots stealing people's designs on Twitter.
This is a blocklist for the sites caught up in the sting operation. Below is a table with the offending sites and links, some of them archived for perpetuity, so you can add them to a blocking service like uBlock Origin and Pi-hole. All you have to do is add this link to your blocklist:
For more, check out Waxy.org's coverage.
Please add your own links in the comments.