Why it failed
My biggest problem with the Pinterest Board Image Downloader was that, similar to my lazerey.es project, I didn't know how to deploy a web app — and that there isn't really a need to mass download images from a pinterest board.
The reason I created it was to quickly download 2000+ images to build & automate Instagram accounts.
What I learned
I learned how to deploy Heroku apps and the limitations of Heroku.
What I could've done better
I could have worked together with someone who knew how to deploy Python-based web applications.