In pre-internet times, one could say the main currency for advertisers was attention. In today’s web 2.0 world, where you can find virtual communities whose characteristics and interests already align with your brand, the main currency is engagement or how much time are they willing to spend with you. Social networking sites demand a lot of a person’s time; so how many social networks can one take? According to compete.com most people are willing to belong to 3-4 social networks maximum.





