[oberstein]

A lot of companies have provisions in their EULAs to allow for copies stored in RAM or by the browsers, e.g. http://storedvalue.com/en-US/terms-and-conditions and I believe streaming services are doing that as well since going to the monitor will require making copies and transforms of the data from the network. It's all pretty funny until someone gets sued.

[baldfat]

Yes this is the cause of many crazy Internet stories of Instagram or FaceBook now own your photos.

Photos on a public web page are implicitly giving you permission to view the photo and the technology need you to have a local copy for viewing. That does not mean you can grab the photos from say National Geographic and re bundle them put them on you website surrounded by adds. They are not giving you permission to do anything but view the pictures.