Uncertain of the quality of DeviantArt's poster printing and the strength of likely sales, I was hoping to try selling a few print-on-demand posters on Zazzle. Via a storefront.
But... Zazzle's Web browser upload of images continually fails, even on multiple browsers and devices; the Google Drive upload has been disabled by Google (because 'insecure'); and I don't use Instagram (which is anyway, so far as I know, only available on mobile devices). Zazzle also withdrew their bulk uploader software last year. Zazzle thus have no way by which I can even upload images... and thus I can't even start a store!
It's probably just as well, though, as it sent me to Redbubble instead. Really easy signup and first upload there. A big market of stuff. They also offer stickers, t-shirts, mugs, etc. They also have UK and European fulfilment of orders, which means there's little risk of 'customs charges' for imports. Great. I'll be setting up a store there. Yes, I know the profit margin is low there (apparently 25%) but what the heck, they'll do all the back-end work re: printing, packing and delivery.