Does FB make $5 a month off the average user? If not, $5 a year? Regardless of what FB makes, could $5 a year keep a FB clone alive at FBs current volume? Would people even pay that?
FB does tens of billions in revenue on 2.1 or 2.2B users worldwide. Far more than $5 a year. I assume a $10 a year social network could break even or even profit. But how many people will really pay? Especially when you scope out to every type of person from every country FB has a hold on.