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On February 14th, we became aware that the metrics for a number of sites has been impacted by the inclusion of a significant amount of traffic from China, and it has been determined that this traffic was not generated by real internet users. The sites affected include the following:

amazon.com
stackexchange.com
ebay.com
github.com
w3schools.com
yahoo.co.jp
amazon.co.jp
adobe.com
pinterest.com
linkedin.com
nytimes.com
paypal.com
washingtonpost.com
wikipedia.org
dropbox.com
apple.com
whatsapp.com
imdb.com
godaddy.com
booking.com
bestbuy.com
ask.com
salesforce.com
soundcloud.com
indeed.com
microsoft.com
onlinesbi.com
yahoo.com
office.com
wikihow.com
spotify.com
cnet.com
google.com.hk
walmart.com
stackoverflow.com
bing.com
bbc.com
theguardian.com
netflix.com
nih.gov
google.com.tw
thepiratebay.org
amazon.co.uk
msn.com
bbc.co.uk
espn.com
google.com.sg
chase.com
tumblr.com
dailypost.wordpress.com
wordpress.com
jpmorganchase.com
forums.wordpress.com
blog.wordpress.com
support.wordpress.com
discover.wordpress.com
developer.wordpress.com

Alexa has identified the source of this inauthentic traffic as well as the methods used to generate it.  We have eliminated that traffic from our data and are in the process of recalculating and reposting metrics for the affected sites.  We have also taken steps to detect and discard this type of inauthentic traffic going forward. The Alexa team is incredibly grateful to the members of our community who alerted us to the problem.

If you have any questions or concerns, or if you suspect traffic to a particular site has been adulterated by inauthentic browsing behavior, contact us here.