You can motivate your PSA/CSA to reach their goal. You must respond them like a family member not stranger. First of all it is important to know the way you can motivate them actually what is their style of learning anything. Do not try to want quick result. We can offer some rewards for them. You have to care of them. Some affiliate would do anything happiness while others won't care. If you want to motivate you have to talk to each affiliate.