Often fake reviews, based on bad facts and clearly affiliate links when you access them.

I think the best promotion, is to have your company mentioned on serious/bigger forums.. Where potential hosting clients meet and discuss different subject.

My norwegian company made all of their 100 first hosting clients thrugh webmaster forums. Simply by providing good services to the clients, helping them with their issues and maybe also be active on the same forum.

Then potential clients often send you an PM, with inquiry about prices, support, servers and so on...