gistfile1.txt

and here is the same request from 208.43.121.200 (and it fails validation because request chain is terminated with content-type  text/html ):

curl -i -c poker_cookies.txt -L -H'User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.5.30729; OfficeLiveConnector.1.3; OfficeLivePatch.0.0; .NET CLR 3.0.30729)' 'http://api.bizographics.com/v2/getuid?api_key=3d2e5d0fe63241629dab1e775752758a&redirect_url=http%3A%2F%2Ftags.bluekai.com%2Fsite%2F23060%3Fid%3D%24UID%26kid%3D0'
HTTP/1.1 302 Found
Date: Thu, 09 Jul 2015 01:02:31 GMT
Location: http://api.bizographics.com/v2/getuid?api_key=3d2e5d0fe63241629dab1e775752758a&redirect_url=http%3A%2F%2Ftags.bluekai.com%2Fsite%2F23060%3Fid%3D%24UID%26kid%3D0&3pc=true
Server: nginx
Set-Cookie: BizoID=9993950c-83c6-4b58-bf74-b7315e663a2f; Domain=.bizographics.com; Expires=Thu, 07-Jan-2016 13:02:31 GMT; Path=/
Content-Length: 0
Connection: keep-alive

HTTP/1.1 302 Found
Cache-Control: max-age=86400, private, must-revalidate
Content-Type: application/json
Date: Thu, 09 Jul 2015 01:02:31 GMT
Location: http://ib.adnxs.com/getuid?http%3A%2F%2Fimp2.bizographics.com%2Fu%3Fan_user_id%3D%24UID%26redirect_url%3Dhttp%253A%252F%252Ftags.bluekai.com%252Fsite%252F23060%253Fid%253D9993950c-83c6-4b58-bf74-b7315e663a2f%2526kid%253D0
P3P: CP="NON DSP COR CURa ADMo DEVo TAIo PSAo PSDo OUR DELa IND PHY ONL UNI COM NAV DEM"
Server: nginx
Set-Cookie: BizoID=9993950c-83c6-4b58-bf74-b7315e663a2f;Version=0;Domain=.bizographics.com;Path=/;Max-Age=15768000
Content-Length: 0
Connection: keep-alive

HTTP/1.1 200 OK
Cache-Control: no-store, no-cache, private
Pragma: no-cache
Expires: Sat, 15 Nov 2008 16:00:00 GMT
P3P: policyref="http://cdn.adnxs.com/w3c/policy/p3p.xml", CP="NOI DSP COR ADM PSAo PSDo OURo SAMo UNRo OTRo BUS COM NAV DEM STA PRE"
X-XSS-Protection: 0
Content-Type: text/html; charset=utf-8
Date: Thu, 09 Jul 2015 01:02:32 GMT
Content-Length: 0