Paid links and paying for conversion can be different pricing structures, but the fact is they are either paying someone in house or for contract to create links to the website through blog. This is common, as blogging, especially if the blogger can get the article on a legitimate website it has value. They can pay in many set rates by volume of work to performance of the links.
Another thing is the website owners can be paid to add new content to the blog via an in-house SEO grunt, who has to add a number of links and space them out based on expected. I.e. one link per blog. They will edit over or add to the actual bloggers content.
Another thing is the website owners can be paid to add new content to the blog via an in-house SEO grunt, who has to add a number of links and space them out based on expected. I.e. one link per blog. They will edit over or add to the actual bloggers content.