As a fellow artist, I'd love to say otherwise, but sometimes we have to admit that not all platforms are built for growing your art business. Sure, you can probably get away with plugging links to your patreon/etsy every time you share your work, but you're not going to get very much revenue from it. You'll be squeezing a square block into a triangular hole.
It's not that artists aren't welcome, it's just that the threadiverse (and reddit by extension) wasn't designed for the purposes you're describing, so you're not going to find the success you're looking for. There's nothing wrong with finding another platform that suits your needs better.