Study says Facebook Pages Less Effective than Search Ads and Email Newsletters for Most Businesses
Other than businesses which involve constant engagement with regular customers (cafes, restaurants, fashion items etc.), it seems most other businesses do not find Facebook Pages that useful to drum up business. A new study by Forrester says that Facebook Presence is less effective than search advertisements or email newsletters.
Basically, users did not expect to get that much amount of Spam in their newsfeed (and email) by 'Liking' the corporate pages on Facebook.