In both the client and real site freerolls zab is giving away more money than he is raking.

For a 150 point $40 freeroll. He would need 134 runners to profit (40 x 500) / 150.

For a 125 point 3k added freeroll. He would need 55 runners to profit. (3,000)-(55)x(# of runners)

Zab was giving away a lot more free money in the 150/$40 freerolls. But in both freerolls he is giving away money as long as the numbers stay below break even points.