This is a shame. Notifo was a great service, and to add insult to injury, I just finished adding Notifo support to my side project (http://loglet.radbox.org/) yesterday. https://github.com/sampsyo/loglet/commit/4b6923f7aaf9b076cdc...

I found the API straightforward and intelligible and signing up a new service was a breeze. I hope one of the alternatives is similarly well-designed.