Triangulation 351 SmugMug and Flickr
this also means AWS += tens of billions of photos on Flickr
There are also many free web sites for hosting photos,
not even counting Facebook and Google.
Beautiful Free Images & Pictures | Unsplash
License | Unsplash
"All photos published on Unsplash can be used for free. You can use them for commercial and noncommercial purposes. You do not need to ask permission from or provide credit to the photographer or Unsplash, although it is appreciated when possible."
Unsplash API | Free HD Photo API
Unsplash API Documentation | Free HD Photo API | Unsplash