Bravo Sewbiz. I too love pinterest but maybe they should have named it "pinspiration" I get so much inspiration from Pinterest. I gravitate towards "theme" quilting when I longarm so I can search for things like "mandala" or "mexican tiles" and scroll through lots of pictures and save what I want to later be inspiration for a quilting motif.
I don't use pinterest to try and find links to free patterns but I do have a board called quilt patterns I like. Most of what I pin I could draft out myself so I don't need a pattern, just the idea. Many people use it that way too.
And so many people repin what others have pinned so it is hard to get to the original source of a Pin. Also not all pins are from other internet content. Some people can upload their own images so there won't be a link to anything at all. Usually those pins are notated as "uploaded by user". This is especially true of photos either taken of your own things, or at a quilt show.
I remember the first time I ran across one of the quilts I had longarmed on pinterest, actually pinned from here on the QB. I was surprised that someone would like my stuff enough to bother to pin it. LOL.
For the most part I really like pinterest and consider it an invaluable source for inspiration. I often get better photo hits on pinterest in searches than I do on any of the web browsers, like Google.