Not meant to argue, but I don't see anything wrong with complaining here. It's an oversight of DreamHost. Of course, it' not really a BIG deal, but it's still a mistake on their part in not setting the correct parameter for this "gift", and therefore inevitably leading to this complaint.
Moreover, please remember DreamHost is running a BUSINESS. Although I am VERY happy that they are upgrading their services (like tripling disk space and bandwidth and now this), all these are done NOT as charity but part of an overall business development planning in order to secure higher retainment rate and/or more new sign-up's. The bottom line is: we are PAYING for them. So while I would say thanks as a courtesy, I know that I am WELL ENTITLED to it as a customer.
To have lived is not enough for them, they have to talk about it. -- Samuel Beckett