Thank you so much for creating this extension.
I tried it yesterday (without creating contests) because basic functions would work for me an I am happy with it.
I also have Ultimate Points extension so I wanted to add 1,200 points to referrer for each referral.
I found the code that updated referral count after a user is added and simply added simple code to update/add the points there in the same SQL statement.
More details on How I added ultimate points for referrals extension