One of the features that sets Prove It apart is the ability to run up to 3 surveys at the same time. This can be paired with the new vs returning customer option to display different surveys for different customer groups.
Surveys are first checked against the customer data for matching criteria. Matched surveys are then served at random. In the case where a customer does not match any criteria (or has already answered the question) no survey will be displayed.
Multi-survey set up example