UPDATE: The Great Facebook GDPR Debacle
I [Mark Zuckerberg] also want to talk about 
privacy. 
GDPR was an important moment for our industry. We did see a 
decline in monthly actives in Europe, down by about 1 million people as a result ... 
MAU and DAU in Europe were both down slightly quarter-over-quarter due to the GDPR roll out ... [
Analyst question]
 "do you have a read into whether things have based out and started to improve again post GDPR implementation?"  Answer: David M. Wehner, Facebook CFO: On 
Europe, yeah, 
we don't have any update on trends. We had indicated in the first quarter that we would expect to see 
a decline. We're 
not providing any guidance on MAU and DAU in Europe on this call ... When you look at the deceleration, the one that I called out was really Europe where you saw the currency impact as well ... 
GDPR causing sort of faster deceleration than in the other regions ... 
Facebook DAU [Daily Active Users]. 
U.S. and Canada, sort of consistent with past quarters, has been 
flat at about 185 million ... 
Europe, we saw the 
declines that we anticipated from 
GDPR. And I would say there, really, those impacts were 
purely due to the GDPR impact, not other engagement trends--
Facebook (FB) Q2 2018 Results - Earnings Call Transcript | SeekingAlpha.com (emphasis and link added).

 
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