I'm trying to find how to advertise in the Sponsored Links box under an Amazon search. Clickriver bans all of my ads because they aren't service business advertisements. I see product advertisements in these sponsored link boxes though on amazon.com. Amazon says it works with 3rd party ad networks as well... what networks are putting this sponsored links box with products in it on Amazon.com then? Google Content Network appears to have no placements available on the site. ???