Very Popular Be*Bo and Fac*book applications

Hey guys
i have Very Popular BeBo and Facebook applications. they are very well used....most of the traffic is from uk/us
i m already using few shitty ad networks for FB applications...Is there any blackhat way to monitize the applications or traffic??
cookie stuffin is too risk so please suggest me other blackhat ways..
cheers

or probably this thread should be in "social networkin site"
mods plz move it if required.
thanks