I thought given that the headline made use of "glance" and "Zuck's face" that the article would be about either or both of:
1. Zuck's purchase of yet another non-revenue generating company: Glancee
2. Zuck's use of copious quantities of makeup.
But this was not the case.
Not knowing what Glancee is, I looked on the App[le] Store's (cached as now dead) page for this product, and discover that it is "serendipity supercharged". Now I know, thank <god>.
I discovered also that it has more than 10,000 active users, so probably does not warrant a USD1b purchase price.