I just think 3D printed sculpts no matter who they’re from, should be made at a good solid number. If you don’t want to paint them all, that’s fine, offer the sculpt individually and ship them out before the others.
A file isn’t comparable to a tailor like Iris for example and her need to strictly produce 20 outfits max per project, she could be a one person job for all we know. That’s as far as she can stretch without dropping her standards.
Once you’ve made the master copy sculpt, print a good seventy sculpts per run and close it for good. Fifteen is absurd in any regard when all it takes is a button or two literally at your fingertips and all is fine. So what people would be upset, it’s your file, they won’t cancel it.