Is there a script/application to sync a hierarchical folder of 100,000 photos to Flickr, now it has so much storage? One set per subfolder. I found a few Windows apps, but they mostly baulked at that many files.
I can't help you with Flickr, but the tools the author mentions in the article (Dropbox for backup file storage and Everpix for auto-organization/exploration/mobile access/selective sharing) can handle 100,000 photos, no problem. Personal bias: I pay for Dropbox and work at Everpix.