I have a viral blog that is growing pretty fast and is reaching around 4m visitors a month. Our Facebook page, however, has "only" around 100k fans which were all purchased directly from FB. The only problem is that I am having a hard time growing my fanbase as it been around 100k for months now. Then I look at other sites such as brightside.me and I see that they are getting around 400k new fans a week! So does anyone know how they do that? I do have some budget for marketing but I find it hard to believe that brightside buys 400k fans a week. So does anyone have some ideas to get real fans that would help grow the activity of the page?