>Of course they have huge network effect and they dominate the SEO, but if executed well then the potential winnings are huge too. I would question that networ

>Of course they have huge network effect and they dominate the SEO, but if executed well then the potential winnings are huge too. I would question that network effect. Granted, on a social network, the network effect can be quite strong: you wouldn't go to another network because your friends are there. Unless there's differentiation, people would shop around. Think people who check prices on Uber, Lyft. People who check tickets on different airlines. Some feature would be a vetting service to avoid scams. I haven't looked into why the review system hasn't solved the impersonation problem on these platform (test and work done by different people).