3
there is 2 existing point module that i know
userpoints by catzwolf
(don't know where to download this)
nckarma by ncnynl
https://xoops.org/modules/newbb/viewtopic.php?topic_id=62295&forum=29&post_id=281035#forumpost281035
there was a discussion about a new module by trabis last time
https://xoops.org/modules/newbb/viewtopic.php?topic_id=64302&forum=30&post_id=290258#forumpost290258
maybe trabis can give an update to this module