I don't buy Alexa rankings.

According to Netcraft at http://www.netcraft.com/

IS Ranks 962
DT Ranks 10486
SS Ranks 11723
BS Ranks 27683
SX ranks 28877
FT Ranks 30142
123 Ranks 37949
SV Ranks 909975
Getty Ranks 3122

MicrostockGroup 691986

btw Google is number 1, and its various sites makeup many of the top 100 sites worldwide