We charge only on performance, unlike many other affiliate networks which charge a setup fee or fixed monthly fee - we only charge 25% override.

What does this mean?
You pay a 25% fee on top of what you want to payout to affiliates. Say you want to pay affiliates £1 for each person they get to sign up to your newsletter. The total fee would be £1.25. Obviously the more the affiliates get the more likely they are to run or push your offer more to their traffic sources.