Since version 2.0 Wsi integrates into the two most famous points systems: MyCRED and Cubepoints
We strongly recommend you to use MyCRED, but as a lot of users still use Cubepoints we have added to this new release.
To enable MyCRED points you need to go to MyCRED -> Hooks -> WordPress Social Invitations and enable it.
For Cubepoints you need to go to Cubepoints -> Modules and activate WordPress Social Invitations. Once you have it activated, you can go to Cubepoints -> Configure to change the default settings.
By default WSI gives 1 point for every invitation sent and 5 points for every invitation accepted. Feel free to change that