Any success stories from Teespring campaigns pivoting into something bigger

Hi all,

I've had an interest in diving into the tee shirt game for years not and am in the early stages of testing out some designs with Facebook ads. Understand there's a lot of hit or miss here but when it hits, it hopefully outweighs the miss, and mostly that the market is saturated.

Would be interested to hear any success stories and where you are now - whether you're iterating on t shirts with Teespring, moved to your own platform (Shopify, etc), or have expanded overall. I realize there's no way in hell I'll be one of those t shirt millionaires you hear about but hope this provides a good base to pivot into something new. Thanks!