"Facebook's system of recommending political groups poses grave threats to American democracy and public safety," Senator Ed Markey says in a letter to Facebook CEO Mark Zuckerberg.

They may not wield massive followers like the Kardashians, but 38% of burgeoning YouTubers express interest in working with brands.

The platform, billed as "social media for good," allows micro-donations to charities with every post.

In a digital age, appropriating a false identity, as Hilaria Baldwin did, is risky. But for any celebrity, deceptions are now easier to find.