I use Pinterest all the time. It has a truly _phenomenal_ similar image recommendation engine, which I use for finding art and design inspiration pictures. Particularly if I want to find reference images for drawing, I find one that looks roughly like I want and then scroll down to the recommended list and get inundated with an endless amount of similar images in that style. It is _so_ useful!

I agree that Pinterest's practices with Google search are pretty poor. But Pinterest as a standalone product is amazing.