Obviously
If Google gets Skype they will record all your conversations and create a searchable database so the NSA can keep track of everything you say and they will sell companies data on your inner most pseudo-private desires in the hopes you won't be too pissed when they call during dinner hours.
Facebook controlling Skype would be much different. Your friends would video/voice spam you with every "must have" for the game of the week they play. Simultaneously everyone will be able to keep track of every bloody sound you make and of course, they will sell companies data on your inner most pseudo-private desires in the hopes you won't be too pissed when they call during dinner hours.
Either way within about two years there will be inet-nannies demanding that the gubbermint "do something", probably "for the children" and the good old congress critters, in the interest of being reelected, will certainly "do something" stupid and ineffective like make a "Do Not Skype" database that will require you to sign up and inform the folks in East Buttfuck what handle to send the majority of their skype spam to. Of course, the usual suspects will be exempt from the don't bugger list based on how much political influence they have or can afford. Typically they are, in order, political parties looking for donations/ support, religiosity groups looking for donations/ support, police and fire groups who want you to enjoy their balls as much as they do and any odd sales fucker you made the mistake of saying hello to in your travels.