There might be some companies that are trustworthy and good for what you do. Does anyone know of any? Anyhow, though, there are a lot of them using bots and/or bad sources to provide traffic. These bad sources are from places where the people stumble on your site. Basically, they are not interested in what you sell, more than likely.
Of course, I'm not out to diss anyone, but this is just from experience.
Of course, I'm not out to diss anyone, but this is just from experience.