It doesn't ensure they stay relevant but it's a better strategy than watching your target demographic leave your platform.

It's a $19B investment in trying to keep people on Facebook. $20B if paired with Instagram and $24B if they had acquired SnapChat.

The numbers sound crazy but they're trying to hold on to and grow a market cap that's currently $175B.

Zuck has some steel nuts but it's what got him to the $175B number in the first place.