Which of the following is NOT a benefit of service memberships?

Guaranteeing job completion without billing is not typically considered a benefit of service memberships. While memberships often include perks like discounted services or priority scheduling, they do not usually guarantee that services will be completed without incurring any charges. In fact, most service memberships offer specific benefits such as fixed prices for certain services, which still allows for payments to be made for the services rendered. The other options, like predictable revenue, discounted services, and enhanced customer loyalty, all highlight common advantages of having membership programs, reinforcing why option C stands out as inaccurate in the context of membership benefits.