[Question] Research methods to drive blackhat traffic

Hi guys,
My question is how to know the traffic sources of a website.
I know a website that have over 150.000 page views per day.
Day 1: 15.000, day 2: 30.000, day 3: 70.000, day 4: 170.000!!! day 5: 125.000
and so on. always >125.000
I know that its traffic is not from Search Engine because the site is very new,
the exact MONTHLY search for the key words in its domain name is only 1.000.
It must be blackhat traffic!
HOW DO THEY DO THAT?
Thanks for your help, guys.

could be coreg

Could be paid traffic.

What about clicks on ads. the site has thousands of clicks per day!!! day 1: 3 clicks, day 2: 5 clicks, day 3: >1.500 clicks!, day 4: >8.000 clicks!!! wow. What the hell is that, guys?
Can we buy thousands of clicks on ads?

you can buy anything for money man ..
i think he might use some clickjacking script anyway ..