General Motors is Advertising on Facebook Again

The return comes after GM stung Facebook last year by charging that the $10 million it spent on ads on the platform was "ineffective." GM spent about $40 million maintaining its Facebook presence, but the bulk of that was 

Link de la noticia: 
http://mashable.com/2013/04/10/gm-back-on-facebook/?utm_medium=feed&utm_source=f...