Facebook Q3 2017 Results

"Our community continues to grow and our business is doing well," said Mark Zuckerberg, Facebook founder and CEO. "But none of that matters if our services are used in ways that don't bring people closer together. We're serious about preventing abuse on our platforms. We're investing so much in security that it will impact our profitability. Protecting our community is more important than maximizing our profits."

Full press release.