While I'm not sure if it counts as "riddled with ads," Skype is certainly moving in the direction of ads: http://blogs.skype.com/en/2011/03/advertising.html htt

While I'm not sure if it counts as "riddled with ads," Skype is certainly moving in the direction of ads: http://blogs.skype.com/en/2011/03/advertising.html http://blogs.skype.com/en/2011/03/advertising.html