Ok so Facebook is getting fined by the UK privacy regulator (I didn't know there was one).

Facebook's quarterly net income is about $500 million, so that's about $2000 million per year.

The fine is £500,000 or $663279 at current exchange rate.

So they're being fined 0.03% of their yearly income. This will clearly be a major deterrent to Facebook committing privacy violations (sarcasm).