According to Bleeding Cool DC comics had purchased various keywords associated with Marvel within Twitter so mentioning Iron Man, Spider-man and X-men would trigger a promoted tweet advert for DC's new 52 for tweeters within the US only. Initially it seemed to go unchallenged but an update has pointed out at there disappearance. Getting publicity for comic releases has always taken some interesting turns such as Marvel's offer of Siege #3 variants to retailers in return for unsold DC comics, any thoughts on this marketing strategy?