A lot of these companies are pre-FB (or right around the same time): PayPal, Craigslist, eBay - those are much smaller than the three giants and on a slight dec

A lot of these companies are pre-FB (or right around the same time): PayPal, Craigslist, eBay - those are much smaller than the three giants and on a slight decline curve over time. Yelp was started around FB times and growing sales are not an indicator of the actual growth.