Who will refer me when I find my first issue. this might be a critical thing that should be top priority, but because nobody knows me and I don't know anyone else you just put me to the bottom. Meanwhile someone evil figures out the same problem and a week latter you discover the "zero day" that was causing so many problems for you was in fact reported earlier.

There is also the possibility that in trying to get someone to refer me I give enough details that the trusted person can submit instead of me and claim credit.