Systems and methods which determines the likelihood that a calling (or in some cases the called) user will pay for a particular auxiliary service are described. A system of an embodiment considers the user's credit risk and his/her propensity to pay, when deciding if the user is eligible for a particular auxiliary service. A methodology used for determining propensity to pay for an auxiliary service according to embodiments is independent from a determination of propensity to pay for a basic calling service. Thus, the criteria used, and the weight given to each criteria, for determining eligibility for auxiliary services can be different from the criteria and criteria weight used for basic communication connections.