Google and Facebook basically split the market between them. Almost all growth goes their way. And Facebook doesn't have an on-page network. https://twitter.com

Google and Facebook basically split the market between them. Almost all growth goes their way. And Facebook doesn't have an on-page network. https://twitter.com/jason_kint/status/793562463119745024/photo/1?ref_src=twsrc%5Etfw https://twitter.com/jason_kint/status/793562463119745024/pho...