Originally Posted by CDSmith

I don't see how sending him traffic, bidding on his site name as a keyword, renders the traffic as "illegitimate". Were the sales themselves legit? When the people buying the trials don't convert or are doing chargebacks etc THEN I'd say it renders your traffic as suspect, but solely based on keywords? I'm inclined to think not.

But that's just me and my oldschool thinking.

If it's not in their TOS then they should pay you.