How do I know you'll surf for me? Is this a scam?

[Surf4Money]

What do you get out of it?

[Cash Club]

First of all, none of us gets paid if I don't surf 4 you. I will
receive a comission of 3% of your balance at the beginning of every
month. That's not taken out of your account, it's just my comission. If
your account balance doesn't grow, I won't make peanuts.....so there's
big incentive to help you make money.

http://www.studiotraffic.com/index.php?refid=120291

If you want to surf yourself, it's 1% instead of .7% of your account
balance daily, but some people have time constraints and can't be on
the Internet everyday. I work on the Internet most everyday so it's
easy for me to surf in your place.