Hello, i signed up in AdOnion.com publisher network, i setup my account created ad zone, and when i generated the code to place in my website i found something Wow look at the last 2 lines of the code <!-- START ADONION CODE --> <script language="javascript" type="text/javascript" charset="utf-8"> site_id = 3944; buynow = 0; ao_sell_text ='';//endofaoselltext zone_id = 8411; user_id = 5624; type = "pop"; test = "pop"; </script> <script language="JavaScript" type="text/javascript" src="http://ads.adonion.com/serve.php"> </script> <noscript><a href="http://www.etech-depot.com" target="_blank">digital camera bargains</a></noscript> <!-- END ADONION CODE --> Code (markup): this line exactly <noscript><a href="http://www.etech-depot.com" target="_blank">digital camera bargains</a></noscript> Code (markup): i was searching their website and i found that they offer SEO service , u choose the keyword u want and they make it position 3 in google first result page. and i figured out that they insert external links in the code so they get back links in all pages that runs their ads, this way they sell their SEO service without publisher knows whats going on, here's my chat with support guy: BECAREFULL