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Reseller hosting is the provision of web hosting services to third-party companies that in turn act as web hosts for other organizations..

Articles can create backlinks to your site, which increase your page rank. These articles have the ability to be republished on multiple sites, creating more links to your site as more sites share...

I also dont know about this sites.. Just you have to check it and then reg..

Very nice offers.. these offers are applicable still...?

Yes.. Ofcourse, I dont know why you have this ques? Social Bookmarking is one of the major important of SEO. It gives more backlinks for the website.