eDonkey/eMule Credit System
 

I understand that the more you upload to a certain client, the more preferential queue spot you get on that particular client in the future, if that client has the file that you're downloading. Is this credit system IP-based? If it is, then it sucks for people with dynamic IPs, and all the uploading I've been doing is mostly useless (but not completely, because it still benefits me in a particular session).