From the PW Affs Website:
How Big Will Be Your Commission With Us? At PWAfss there is no top limit on the commission rate offered to you. The minimum we offer is 40% Revenue Share (No Negative Carry Over) and we are always ready to discuss exclusive deal with you. We also offer a two tiered option tailored towards webmasters that also market to other affiliates. You can earn a competitive 10% of the revenues produced by webmasters that you refer to our affiliate program.