Why do some companies get depeered and some don't?

Why do some companies like Cogent get depeered relatively often and companies like Teleglobe don't even get talked about and operate in silence free from depeering? -- Hyundai to launch the i20 in India. Catch the exclusive preview on ZigWheels.com http://www.zigwheels.com/b2cam/newsDetails.action?name=Emb11_20080731&path=/INDT/News/Emb11_20080731&page=1&pagecount=2&utm_source=indmail&utm_medium=footer&utm_content=tracking&utm_campaign=Nletter_07oct2008_ZW