Honestly, I'm kind of concerned that my brother submitted his. I was a sperm donor in the early 90's for a fertility clinic. One of the girls in my EMT class asked if I was interested in doing it because they were looking for blonde hair/blue eye donors. I did it with my wife's (girlfriend at the time) approval.
My mother passed away when I was two and my father had a vasectomy. Long story about that. Anywho, I have a younger brother due to a sperm donor for my stepmom after my dad remarried. So I knew there was a need.
I think it was 50 bucks a pop 3 times a week for 3 months. It's how we paid for our wedding.
So there may be a bunch of early 30's little KVR28's out there that might have submitted to these sites and my brother could pop up as a strong familial hit.
I don't know if my wife could handle if they started trying to contact me.