OK, so Google recent algorithm change removes low quality content like duplicate or rewritten content. Thing is it is open secret that most writers here or in other forums do some rewriting of articles either manually or using software. So does that mean that these writers have to improve and lose business? Does that mean that rewritten/ duplicate content on unique class c IP blogs are also treated as spammy by Google? Which means unique content is more important than unique c IP is irrelevant?