It's not a blip. It's part of a pattern including GDPR fines that has a certain weight. At the end of the day any fine hurts shareholders at least a little but even if fines get so high that profit is decimated and stock plunges, as long as incurring fines is more profitable than other business tactics, and there is enough free cash flow to make liquidation unprofitable to private equity / corporate raiders Facebook will continue operating as it does.

Same as for any business.