I see ClixSense banned users from Iran, but Alexa ranking says this is very popular there: Clixsense.com Traffic, Demographics and Competitors - Alexa How is this possible?

Second question. Where are the most active referrals coming from?

I'll give your questions a go...

1. Traffic is traffic, not membership.

2. I don't know. You'd have to submit a support ticket and they might answer
you and they might not. My answer would be, every where. Although I am not
positive of your question. Not sure if you are asking what country they are coming
from or what areas of the www.