Custom timer and HTTP referer. They have their own surf application.
Too many users
0.7 surf ratio
Has surf application only. They also have Linux surfer application.
Hidden referral for default. Referral override option for premium users.
They have a click links option! It clicks your site internal links which is very helpful for bouncerate & PV!
Can add upto 5 websites.
Surf timer 10 to 180 seconds