Blog posts 500 words each - Long term, pay per post

I need a person for writing blogs posts on a daily basis as and when required. The blogs are in different niches and on different subjects, so you need to be able to write about anything. Requirements: Each post must: 1) be written in perfect US English, 2) be reader focused, well researched, informative and readable 2) pass Copyscape, 3) be minumum of 500 words, 4) not have any spelling, punctuation or grammar errors, 5) be 100% unique, original and on topic, 6) use the keyword phrase in the body for 2,5 to 3% density, 7) must include LSI keywords in the body. Any post not meeting the above requirements will be rejected. I will own all copyrights to all work upon payment. This means you will not sell, reproduce or re-use these posts contents in any any way for any reason (including resell, reuse, re-write or give away). You agree that upon sending me the posts contents all rights to the them transfer to me. You need to be able to communicate wih me through an instant communicator preferable google talk. I will pay you 2$ per post. As i may hire more than one person, i would like to pay 'Per Post', so when you bid please do not ask for a milestones. Please send me your writing samples or links to your samples and be prepared to write a sample on the topic of my choice. Bids will not be considered without samples. Also note that if after a period of time the posts contents you send me start to fall in quality, i will contact you to end the project and hire another person if i need. Please write " I HAVE READ THIS" to confirm you read the above. Thanks