Monthly Blog Commentetor Required

I am currently looking for a blog commenter who can comment on only Tech/SEO/Make Money Online [login to view URL] is a monthly job and every month i want 500 approved comment with active website link of mine from 500 different and unique blogs. I will pay 30$ for 500 approved comment from different [login to view URL] have to be commenting expert so that your comments get approved. NB:- I will pay only for approved comment which has my link as active and from related blog that i have mentioned above. If any links get deleted ,you have to remake them. I will need 1 sample comment with my blog, details i will give ,so that i can understand your comment will always get approved by webmaster.. I don't need sample for free link, i just want to check ,if you can seriously do the job. Till now i am not able to get any commenting export , one of my job is still open, but i am not able to get one good commentator. As this is long term job ,so i can't always look for new commentator , because of that i need sample , so that i can pick one who will do my job regularly, complete in time ,so that i can assign more jobs. If interested , please place you bid.