What he's saying is that Facebook is a great contacts directory, because everyone is on it. But most of the other features are useless.

(Recently, most of the features of Facebook broke for the combo of Ubuntu 14.04 LTS, Firefox 34, and Ghostery. Messaging and notifications still work most of the time, but many of the other features just stall, probably waiting for some tracker. This turns out to be a feature, not a bug. No ads, no timeline, no crap.)