Kind of off-topic, but it's really use for HBO to bring this entire operation down if they want: the domain name contains their trademark, "HBO". In these cases it's much better to have a generic domain name (i.e. "takemymoneycable" or something like that), than to do trademark violations.
I've had to learn this the hard way, unfortunately ...
Infringement may occur when one party, the "infringer", uses a trademark which is identical or confusingly similar to a trademark owned by another party, in relation to products or services which are identical or similar to the products or services which the registration covers.
How is this a product or service similar to what HBO is offering..? Merely invoking the name of a product/service is hardly a trademark violation -- otherwise every single HN commenter who has griped about Apple/Google/Microsoft/Facebook products would be infringing.
I've had to learn this the hard way, unfortunately ...