Hi Glitterfart, Great question!

I think the reason for this (and someone please correct me if i am wrong); Cryptofresh is only counting referrers if the created user account has a different referrer than the registrar; generally when a user creates an account with openledger directly the referral % is set to 0 and both the registrar and referrer are set to the same account.

If this was not the case Openledger would be in 1st position by a long margin.