The Spanish Town That Runs on Twitter(nytimes.com)
nytimes.com
The Spanish Town That Runs on Twitter
http://www.nytimes.com/2016/06/09/technology/the-spanish-town-that-runs-on-twitter.html
http://www.nytimes.com/2016/06/09/technology/the-spanish-town-that-runs-on-twitter.html
I suppose any negatives are mitigated by a) the likelihood of Twitter going bust or playing foul is remote, b) the town can always transition to another network if needed, c) most people have Twitter installed on their mobiles already, removing the hassle of having to download and learn another app.