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Consider if you should be guest posting or if you should instead be putting that same content exclusively on your own site. If you can place a guest post on this other site and it will deliver 100,000 visitors then giving them your content is probably a good thing. However, if you instead place that same content on your own site here is what might happen. Let's say that article pulls in just ten or eleven visitors per day that will be about 4000 visitors per year. Let's say that just one visitor out of a thousand buys something from your site then in each year it will product four sales. Let's say that ten visitors out of that thousand tweet or FB share a link to your article.  And those pull in another 500 visitors per year. Let's say that just one visitor in 20,000 will link back to your site. What will you have at the end of five years?  You will have the same number of links that you had from giving your content away.... You will have made about 25 sales and that article is still on your site. To me it makes an awful lot more sense to develop great content  and place it on my own website.  I am not going to build the site of my competitor. On top of that... if you give an article about a productive keyword topic to your competitor and their site outranks yours then you are just handing your lunch over to them. So, if you are a reasonably smart person who can make great content then don't give it away.  Keep it for use exclusively on your own site.  The only time that you should be giving it away is if you know that the traffic from the other site is going to be absolutely an astonishing number. Guest posting is enormously popular so there are going to be lots of people who agree with me.  That's OK.  They can give me their great content and I will enjoy eating their lunch.