Hi there, So I'm looking at one of my keyword competitors backlink profile. I found some strong links but not niche related at all so I went to the page to have a look. I open the site (PR5, DA55), and it's an inner page ( PR 3, PA32) and in the first glance I couldn't find the links . So, I did a search on the page code and then I've found the links. They are in the footer (along with another site) same colour as background and in a small size ...hidden basically. I thought that the guy/girl may be the owner of the site and decided to kick this new recent site .. but then when I look to the rest of the backlink profile I found more and more sites like these ones. All different niches, authoritative sites and very popular (among their niche). The hidden links were only in this inner page, not in any other page or the home page (which would be even more powerful, in case the guy/girl owned the domain would be a better option). There's even a governmental site where this happens. In this case is in the header (just before the first text). I see 2 options - He/She is the webmaster of this sites and insert some hidden links to power up his/her business . Due to the different of languages and countries does not seem really the case. - hacked sites, where you can insert html code. Have you ever've seen this ?