Thanks for the feedback! We are working with Flickr to ensure that we are able to index all their CC-licensed images; currently there's an issue with their API

Thanks for the feedback! We are working with Flickr to ensure that we are able to index all their CC-licensed images; currently there's an issue with their API that hides some images. It should be resolved by the end of the summer. We have images from a lot of other collections, such as the Met, Rijksmuseum, Behance, Thingiverse etc. Flickr has more images than any of them by a couple of orders of magnitude, though.