I've seen mine copied to Pinterest and it links back to this site where you're identified as the maker so I have no problem with it. Not sure about others, I've not seen any rules.

I love looking at the quilts in the gallery. I am an active Pinterest user. I save quilts and use them for inspiration, layout ideas, border ideas, color combinations, etc. If you loaded a quilt into the gallery, how do you feel about someone pinning it? I do not sell quilts, personal use only. I didn't want to pin any of the lovely quilts without making sure it was acceptable. Thanks for sharing your thoughts, feelings on this.