> They've convinced people to subscribe to advertisements so they see them as soon as they're posted. That's even better than Facebook convincing everyone to give them all their personal information so it can be 'shared'.

Except Facebook also gets people to subscribe to advertisements so they (have a chance of) seeing them as soon as they are shared.

But Facebook actually builds it's business model around that, unlike YouTube, and charges the advertisers more to reach more of the subscribers even after they've expressed interest, while YouTube treats videos as a venue for ads it sells, but doesn't treat the channel-subscriber relationship as an advertising channel to monetize the way Facebook does with Pages.