Does anyone know how these services http://www.qualityguestpost.com/guest-posting-service-on-high-authority/ http://iguestblog.com/ Actually manage to submit articles to blogs like: http://www.HuffingtonPost.in http://www.Business.com http://www.Inc.com and http://screencast.com/t/nWZb9clrr etc ? Obviously their main service is a blog network, but this is a premium one - how do they manage to get their links inside these blogs ? Do they have authors there or do they use some kind of a middleman platform ? Contacting authors on all these popular websites and having connections there is impossible for small sites like these. Anyone knows how is that done ?