I shared a free JSON API with parse.com with a bunch of friends to develop a set of FOSS CLI apps we communicated over.
It was all open and fun and funny.
Then parse.com shutdown. https://en.wikipedia.org/wiki/Parse_(platform) -- What started out as fun project for several developers turned into a dead project for us all, which by then had hundreds of users around the world, who were now getting errors instead of fun.
We all used different programming languages, nobody was able to re-engineer all of our clients into a new endpoint/api. My takeaway -- any one of us could have hosted the JSON api, but we made the mistake in thinking we would use a free 3rd party service. That decision killed the project.