Were it not for the nofollows on the links, I'd guess this was a shill just to get a link on a site that would later be turned into an all-ads site, or a PDF af

Were it not for the nofollows on the links, I'd guess this was a shill just to get a link on a site that would later be turned into an all-ads site, or a PDF affiliate site. There seem to be quite a few PDF software affiliate programs if you Google "PDF affiliate."