I created an ebook around a niche topic which will be available for free on one of my relevant niche sites. The ebook will be sent directly after an interested user leaves his mail/signs up for the newsletter, perhaps later also by direct download, well see. The ebook contains aff. links. Besides the free distribution through the niche site I want to spread the ebook all around the web to give the topic a boost. While I know many of the website services in the BHW Marketplace for linkbuilding/PBN I haven't found one who is focused on advertising/spreading a digital product like an ebook. I thought of something like an upload service to document sharing sites followed by a link indexing/tier1/2/3 service. Do you know something like this? Of course I could upload it myself and only add the indexing/link building afterwards... Or is this much easier than I think and I should use one of the more common Marketplace services for linkbuilding on the the ebook/pdf url instead? Would love to hear your thoughts on this.