Google announced EMD Updates. Google EMD update makes it very clear that the purpose of introducing this filter is to penalize poor quality websites, which get higher rank just because of their domain names.
Organic SEO practices do not allow building invisible pages stuffed with relevant or non-relevant keywords. Most search engines have already issued the regulations prohibiting the usage of doorway pages.
Generally, first time SEO buyers make only the cost of SEO package their sole criteria for the selection of SEO company. The smart service providers quote bare minimum prices; and most of time the quoted prices are impractical.
Link development is seen as the only SEO practice by the SEO companies that surely delivers results.The SEO companies,working at very low price, generally follow this practice of creating numbers of links, whether these are on relevant pages or not.
If your SEO vendor is using automatic submission tools, stop the use of those tools. These time saving tools make the task easier but many times these fail to analyze and judge the relevancy of platform where we get the link.