First of all I want to tell that SR index is from 0 to 100.000, the SR index reflects the impact and the importance of the start up in the society and the internet.
SR is separated into SR web and SR Social.
Sr Web is independent to some facts like the quality of the web-site , the people who use and share that website , and the quality of the links related to that website. On the other hand the SR Social is independent from the number of likes,comments and shares on the Facebook and Twitter.
Airbnb owns this with full of 93361 SR points!