$5 per user is equal to $5,000,000,000 for revenue and I think Facebook made $1,000,000,000 net profit last year, so Facebook makes about $4.5 per person gross

$5 per user is equal to $5,000,000,000 for revenue and I think Facebook made $1,000,000,000 net profit last year, so Facebook makes about $4.5 per person gross and about $1 per person profit at the moment.