As far as I can tell, every uploaded file is being put in a new folder. Every one. They may look like individual files in sta.sh, but really, it's they're just folders with a single photo in them.
And naturally, my plugin attempts to follow the documentation. It keeps track of the folderId of the last photo (which is helpfully returned by Sta.sh), since, you know, if you pass in a specific folderId, you'd expect it the photo to be given back with the same folderId that you passed in, and it's "better" than just using a folder name.
Clearly, for various degrees of 'better'.
And so my plugin broke. Badly. It would get a folderId back for the first photo, merrily assign that to the next photo, get a different folderId back, assign that to the next photo, and so on. Folder-ception.
(You know I'm annoyed when my anger gets into my commit comments.)