To those mentioning that Facebook's revenue is $70b: their net income is only around ~$18b. This would be half of Facebook's net income for an entire year, which is substantial. It's a big deal to them.
Turning over a profit of 9Bn, its still after this fine..
Thats still huge. Given their assets, cash on hand etc. I don't think they will lose much sleep.
Anyway they will get away with it. They can afford to.