Once you will have points for each user, you can show them on site. Mycred has a lot of integrations for Profile plugins, for example, for Buddypress. But also, you can show points for user inside widget or via shortcode which you can place on page.
You can be interested in some special addons of Mycred. For example, email addon which can send emails to users about their approved cashback. You can also give users special badges for their approved points via Badge Addon.