Lots of Articles Needed - $1 per article - Long term work

I need someone that can handle bulk work and/or has a team of writers. Project Description: I need regular and totally unique articles writing about different subjects. Each article needs to be a 300 - 500 word articles using specific keywords to enhance a specific websites SEO or by following the directions of the instructions to write an informative article. Each article must have correct grammar when using 'Keyword Placement' and also be 'Keyword Rich' when the article calls for it. Each article produced must be considered as 'unique content' on any internet search engines. All copy submitted will be screened through COPYSCAPE for Plagiarism. Any work submitted that isn't unique content or it is something that has been put through an article spinner will not be paid for. No Milestone Payment - Payment is based on approved work.