OT:
Flickr had a bulk uploader application (Uploadr) years ago, you can still use it to do bulk uploads.
https://www.flickr.com/help/forum/en-us/72157645005486178/
https://www.flickr.com/help/forum/en-us/72157643429983504/
https://www.flickr.com/help/forum/en-us/72157644338150014/
the app itself is available at http://flickr-uploadr.en.softonic.com/