Affiliate pay is always flat CLAMS.
100% for faucet use & 0.10545574 CLAM for each address dug. We pay out on the same block as the person you bring as well.
Tx fees... I'll send kef here for that, but I'm thinking it's like... nothing (CLAM tx fees are cheap.)
I really like your idea about multi single address digging. I'll talk to kef about implementing that soon... sounds easy enough!