This was a side hustle I created MANY years ago. At it’s peak I ranked above all the top sites on Google for anything involving t-shirts. The site is powered by WP and uses the printing company Spreadshirt. As a top member of the Spreadshirt community, I had assisted and helped more than any employee there. This site was very profitable as it was geared towards the younger crowd. However Spreadshirt took a drastic change in leadership. Wiped out the user forums in place of some hard to use forum software. Changed the backend which completely destroyed years of work, for not only myself, but many others.
I stopped adding shirts to it. At its peak there were over 4k t-shirt designs. One day I may work on it again. One… day..