atlrus - 5:02 pm on Jul 3, 2013 (gmt 0)
For example a kind WebmasterWorld member has sent me some search queries related to niche "Assisted Living" which illustrated how at least 3 different domains of same owner are within top 10 results of first page of Google Serps for the same search query. Such spam method is pushing possible valuable sites of honest webmasters out of top ranking on Google Serps.
Don't really see why this would be considered spam?!? I have never seen 3 identical websites ranking on page 1, so I assume you talk about different websites owned by the same company. Ownership of domain name should be irrelevant. Many companies, even in "real life" have more than one brand name in the same category of product. For example, General Mills has nearly 50 different cereal brands, some pretty much the same, like Honey Squares and Honey Clusters :)