I had a similar experience with NameDrive recently, and for a domain they had previously explicitly accepted into their program, knowing full well where the traffic was coming from. I know that because I had a dialogue with them about it when I put it into their system.
They came back to me later and said "Google won't pay us for recent traffic, so we aren't going to pay you".
Seems they want to have their cake and eat it. i.e. take all the money when google pay them, but when they don't, just pass all the risk onto the domain owner. So its a partnership when things are going well, but if not, they let you sail down shit creek without a paddle.
What annoys me most is this was over the amazing amount of $45. Such is their idea of "customer service". They could have said "split the difference", or whatever, and kept me as a client, but no, they stuck to their dogmatic position that I as the domain owner has to take all the risk, T&C, blah blah yada.
So not only have they lost a good client, they are helping to spread the word that parking companies are basically leeches.
I will never park any new domains there. The fact I did all the Thai translations for them without asking for a penny does kind of wrangle with me. They don't seem to have heard of karma .... or indeed, simple ideas about how to retain clients
peace