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Using traffic exchange programs the admin of a site is paying an amount of money to the owner of the traffic exchange program. In retunrn, he gets as much traffic as he paid for. For example he paid 10$ for 10.000 impressions. The admin of the traffic exchange program keeps from himself an amount of the money received and reinvest the rest, giving money to people who subscribe to his program to earn money.

I can not understand whether you asking or describing about traffic exchange which pays to surfing. If you really want to know about traffic exchange that pay for surfing that are Easyhits4U(pays $0.30 for every 1000 page surfed ),Topsurfer(0.02 every 35 page),Website-traffic-hog,TrafficDelivers & Hot-website traffic (random cash between page surf and cash promo every day/week),Smiley-traffic($0.30 or .40 per 1000 page surfed) and some more. above programs are trusted and pays regularly, you get more sites if you search in web. Also almost all TE pays referral commission under join you it is extra if you want to more cash. If you wish to join some you can use my referral link.