Twitter may be free of advertising, but that hasn't stopped brands from trying to get in front of users glued to the fast-growing service. They've made their presence felt in subtler ways, such as holding quizzes and donating to charities in the hopes visitors will tweet about a brand. One of the more recent efforts involves brands looking for a persistent presence in the Twitter stream through users' profile pictures.
Twitter, Facebook Profile Pictures The New Branding Opportunity
Twitter, Facebook Profile Pictures The New Branding Opportunity