Give points to user for sharing content

I'd like to give points to users for sharing content via ShareThis.

Is the following possible (taken from https://drupal.org/comment/5671002#comment-5671002:

Yes but we can implement referrer.

I have the following scenario in mind:
A user click share on a page like this:
http://example.com/node/123

and I want the service link url to be:
http://example.com/referrer/[ref_code]/node/123

The referral function will redirect after referrer cookie is set to:
http://example.com/node/123

I like sharethis.

Is something like this possible?