I've run into an issue on a site I was trying to use this module with that, at present, means I can't use it... I'm going to have to jury-rig something else instead. But I'm posting this as a feature request in hopes that, in the future, maybe it could be addressed and others with the same need would have an easier time.

The problem is nodes with multiple authors. This is a pretty common occurrence, particularly for sites with a medical, scientific or academic focus - journal articles very frequently have more than one author. But Drupal core doesn't really allow for that, so the solution I've seen recommended everywhere I've looked, and that was used on the site I'm working on at present, is a custom user reference field called Authors that can take multiple values, and adjusting the display style everywhere authoring information might be displayed to use that instead of the core author field.

But of course, this module isn't geared to recognize a custom field in place of the core author field. So I was hoping that maybe, at some point in the future, maybe it could have an option to choose a custom user reference field to use instead of the core field when awarding points to node authors.

No rush - I have to have this working pretty much today, so that's obviously way too soon for any module changes to happen. But if it could be done in some future, it would make life a lot easier for anyone working on a site where this is a factor.