Almost all parking programs work the same way: you change your name servers to that of the parking company and then add your domain to your account with that company.
I've been having a bit of a problem lately. When I register/purchase/win an auction for a new domain name, by default depending on the registrar, it will set the name servers to one of the parking services I deal with. This saves me having to manually go in to change the name servers. The problem is I don't always immediately add those domains to my parking account. I try to deal with parking bits just once a day. Seems like that is a more productive use of my time. Unfortunately, it seems that some unscrupulous people are tracking name server domain gains and adding gained domains to their accounts with the same parking companies. Essentially they are trying to steal the revenue from the domains. The normal procedure with the companies I deal with is that you need to submit a ticket to get ownership of the domain verified.
I've mentioned this to a few active domains who basically gave a virtual shrug of their shoulders as if to say there's nothing wrong with it.
Come on. These same people have to be doing it to more than just my domains. Aren't parking companies noticing this? Unless of course they are the ones responsible.
I have no problem with the parking company receiving any revenue generated because of my own delay in adding domains. But I do have a problem with people that are essentially stealing. I also have a problem with parking companies that sit back while people do this and put the onus on the legitimate owner. Meanwhile, while I wait a day or two or three for ownership to be verified, the thief continues to make money.
I'm not a Sedo fan by any means, but I do have to say at least this is one thing they have right: if the email address associated with a domain does not match the email address they have on file for you, they will verify ownership. Granted their reasoning is more likely tied into concerns about sales than about parking revenue... and this also poses problems for those of us that use multiple email addresses on our domain ownership records... but how much work would it be for parking companies to implement such a practice? Or at least to take action on people stealing the traffic/revenue of others.