I think what OP was getting at was is if you're processing each example on the fly, why aren't the unedited default examples cached so if a user just hits "Run" they can see it working, regardless of whether it's their own content or not.
A link to a website which publishes photos without authorisation of the author does not in itself constitute a copyright infringement
Sorry for my naivety here but the way this is worded is creating confusion for me. Does the article mean: